Green Lentil Vegetable Casserole

Featured in: Everyday Meal Ideas

This wholesome one-dish meal brings together tender green lentils and a colorful medley of vegetables including carrots, zucchini, bell peppers, and mushrooms. The vegetables are sautéed with garlic and onions, then combined with protein-rich lentils and aromatic herbs like thyme, oregano, and smoked paprika. After baking with a parmesan and breadcrumb topping, you'll get a golden, bubbling casserole that's naturally gluten-free and vegetarian. Ready in just over an hour, this satisfying dish serves four and works beautifully for meal prep or weeknight dinners.

Updated on Wed, 28 Jan 2026 13:19:00 GMT
Golden-brown Green Lentil and Vegetable Casserole bubbling with melted Parmesan topping, served with fresh greens. Save to Pinterest
Golden-brown Green Lentil and Vegetable Casserole bubbling with melted Parmesan topping, served with fresh greens. | simplebissara.com

The evening was damp and gray, and I was rummaging through my pantry feeling uninspired when I spotted a forgotten bag of green lentils pushed to the back of the shelf. My vegetable drawer was bursting with produce that needed using, and suddenly this casserole was born from necessity. I remember how the kitchen slowly filled with the aroma of herbs and vegetables as it baked, transforming my mood along with those humble ingredients. That first spoonful, steaming and hearty, convinced me some of the best recipes emerge from simple ingredients and a little creativity.

Last winter, my neighbor was recovering from surgery and I wanted to bring over something nourishing but not boring. This casserole was still warm when I delivered it, and she texted me that evening saying her whole family devoured it and wanted the recipe. The next community potluck, three different households brought their own versions of it, each with slight tweaks. We laughed about starting a green lentil casserole revolution in our little neighborhood.

Ingredients

  • Green lentils: The foundation of this casserole, they hold their shape beautifully without turning mushy, creating that perfect hearty texture.
  • Vegetable broth: Use homemade if you have it, as it adds layers of flavor that transform the lentils as they cook.
  • Mixed vegetables: The combination of sweet carrots, earthy mushrooms, and vibrant bell peppers creates a rainbow of nutrition and flavor.
  • Herbs and spices: The smoked paprika is non-negotiable, adding that subtle smoky depth that makes people wonder what your secret ingredient is.
  • Parmesan cheese: Creates that irresistible golden crust that makes everyone fight for the corner pieces.

Instructions

Product image
Mix batters, prep ingredients, grate vegetables, and store leftovers easily during baking and everyday cooking.
Check price on Amazon
Prepare the lentils:
Rinse them thoroughly under cold water, picking out any small stones that might be hiding. Simmer them in vegetable broth until tender but still slightly firm to the bite.
Sauté the aromatics:
Cook the onions and garlic until they become translucent and your kitchen starts to smell like heaven. This foundational flavor will carry through the entire dish.
Add the vegetables:
Layer in the vegetables starting with those that take longest to cook. Watch as they begin to soften and release their flavors into the mix.
Combine and season:
When you fold everything together, be gentle but thorough so the lentils dont break down. The mixture should look colorful and abundant, a visual promise of the meal to come.
Bake to perfection:
As it bakes, the top will develop that gorgeous golden crust while the flavors meld underneath. Your patience will be rewarded with every bite.
Product image
Mix batters, prep ingredients, grate vegetables, and store leftovers easily during baking and everyday cooking.
Check price on Amazon
Freshly baked Green Lentil and Vegetable Casserole featuring colorful carrots, bell peppers, and spinach. Save to Pinterest
Freshly baked Green Lentil and Vegetable Casserole featuring colorful carrots, bell peppers, and spinach. | simplebissara.com

One particularly memorable evening, I served this casserole during a power outage in our neighborhood. We ate by candlelight, and something about the warmth of this dish against the darkness outside created such an atmosphere of comfort and connection. A friend remarked that it was like the food version of a hug, substantial yet gentle. Sometimes the simplest meals create the most lasting memories.

Make It Your Own

This casserole has evolved countless times in my kitchen based on what I have available. Ive added butternut squash in autumn, swapped in kale for spinach in winter, and brightened it with fresh herbs from my summer garden. Each iteration teaches me something new about how these ingredients play together, like a flavorful conversation that never ends.

Serving Suggestions

Theres something magical about serving this alongside a simple green salad dressed with nothing more than good olive oil and lemon juice. The brightness cuts through the richness of the casserole, creating that perfect balance that makes you want another bite, and then another. On particularly cold evenings, Ive been known to add a slice of crusty bread for soaking up every last morsel.

Storage and Reheating

What I love most about this casserole is how the flavors develop overnight in the refrigerator, making leftovers somehow even better than the original serving. The lentils continue to absorb the herbs and spices, deepening the flavor profile in ways that always surprise me.

  • Store leftovers in an airtight container for up to four days in the refrigerator.
  • Reheat individual portions covered with a damp paper towel to maintain moisture.
  • For freezing, portion into single servings before freezing for up to three months.
Product image
Whisk eggs, batters, sauces, and cream smoothly for baking, cooking, and everyday meal prep.
Check price on Amazon
Rustic casserole dish with tender green lentils and roasted vegetables, perfect for a comforting family meal. Save to Pinterest
Rustic casserole dish with tender green lentils and roasted vegetables, perfect for a comforting family meal. | simplebissara.com

This green lentil casserole reminds us that nourishment comes in many forms, not just from the ingredients themselves but from the care with which they are prepared. I hope it brings as much comfort to your table as it has to mine.

Recipe FAQs

Can I make this casserole vegan?

Yes, simply use a vegan parmesan alternative or omit the cheese entirely. The casserole remains delicious and satisfying without dairy, especially with the addition of smoked paprika for extra depth of flavor.

What vegetables work best in this casserole?

The recipe is very flexible. Root vegetables like sweet potatoes, squash, or turnips work beautifully. You can also add other seasonal vegetables like kale, green beans, or eggplant. The key is cutting everything into similar-sized pieces for even cooking.

Can I use red lentils instead of green?

Red lentils cook faster and become softer, which can make the texture mushier in a casserole. Green or brown lentils hold their shape better during baking, making them ideal for this dish. If using red lentils, reduce the initial cooking time by about 10 minutes.

How long does this casserole keep in the refrigerator?

Leftovers store well in an airtight container for 3-4 days. The flavors actually develop and improve overnight. Reheat in the oven at 350°F (175°C) for about 15-20 minutes, or until warmed through and the topping is crispy again.

Can I freeze this casserole?

Yes, this freezes exceptionally well. Assemble the casserole but skip the baking step. Wrap tightly in plastic and foil, then freeze for up to 3 months. Thaw overnight in the refrigerator, add the breadcrumb topping, and bake as directed.

Green Lentil Vegetable Casserole

Protein-packed lentils baked with seasonal vegetables and herbs for a comforting vegetarian meal.

Prep Time
20 minutes
Cook Time
50 minutes
Overall Time
70 minutes
Recipe by Ava Turner

Recipe Type Everyday Meal Ideas

Skill Level Easy

Cuisine Type International

Portions 4 Number of Servings

Dietary Info Vegetarian Option, Gluten-Free

What You'll Need

Lentils

01 1 cup dried green lentils, rinsed
02 3 cups vegetable broth

Vegetables

01 1 medium onion, diced
02 2 cloves garlic, minced
03 2 medium carrots, sliced
04 1 medium zucchini, diced
05 1 red bell pepper, diced
06 1 cup button mushrooms, sliced
07 1 cup cherry tomatoes, halved
08 2 cups fresh spinach, roughly chopped

Herbs and Seasonings

01 2 tablespoons olive oil
02 1 teaspoon dried thyme
03 1 teaspoon dried oregano
04 1/2 teaspoon smoked paprika
05 1/2 teaspoon ground black pepper
06 1/2 teaspoon salt

Topping

01 1/3 cup grated Parmesan cheese or vegan alternative
02 1/2 cup gluten-free breadcrumbs, optional

How to Make It

Direction 01

Preheat oven: Preheat the oven to 375°F.

Direction 02

Prepare lentils: In a medium saucepan, combine lentils and vegetable broth. Bring to a boil, reduce heat, and simmer uncovered for 20 to 25 minutes until lentils are tender but not mushy. Drain any excess liquid.

Direction 03

Sauté aromatics: While lentils cook, heat olive oil in a large skillet over medium heat. Sauté onion and garlic for 2 to 3 minutes until fragrant.

Direction 04

Cook root vegetables: Add carrots, zucchini, bell pepper, and mushrooms. Cook, stirring occasionally, for 5 to 7 minutes until vegetables begin to soften.

Direction 05

Finish vegetables: Stir in cherry tomatoes, spinach, thyme, oregano, smoked paprika, salt, and black pepper. Cook for another 2 to 3 minutes until spinach wilts.

Direction 06

Combine ingredients: Combine cooked lentils and sautéed vegetables in a large mixing bowl. Mix well to combine.

Direction 07

Assemble casserole: Transfer the mixture to a greased 2-quart baking dish. Sprinkle with Parmesan cheese and breadcrumbs if using.

Direction 08

Bake: Bake uncovered for 20 to 25 minutes, until the top is golden and the casserole is bubbling.

Direction 09

Rest: Let rest for 5 minutes before serving.

Tools Needed

  • Medium saucepan
  • Large skillet
  • Mixing bowl
  • 2-quart baking dish
  • Chef's knife
  • Cutting board

Allergy Details

Always review all ingredients for allergens and check with a healthcare provider if uncertain.
  • Contains milk from Parmesan cheese
  • May contain gluten in breadcrumbs
  • Use vegan cheese and gluten-free breadcrumbs if needed
  • Always check ingredient labels for potential allergens

Nutrition Details (per serving)

Nutritional data is just for reference. Please don't treat it as medical or dietary advice.
  • Calories Count: 320
  • Fats: 8 g
  • Carbohydrates: 48 g
  • Proteins: 16 g