Green Lentil Vegetable Casserole

Featured in: Pan & Oven Essentials

This nourishing one-pot bake brings together tender green lentils and a colorful medley of vegetables including onions, carrots, celery, bell peppers, zucchini, cherry tomatoes, and mushrooms. Seasoned with dried thyme, oregano, and smoked paprika, the casserole simmers in vegetable broth before finishing in the oven until golden and bubbling.

The result is a satisfying, protein-rich vegetarian centerpiece that delivers deep flavors and comforting textures. Ready in just over an hour, this European-inspired dish serves four generously and adapts beautifully to whatever seasonal vegetables you have available.

Updated on Mon, 26 Jan 2026 18:17:36 GMT
Golden-brown Green Lentil and Vegetable Casserole bubbling in a baking dish, topped with melted Parmesan and fresh parsley. Pin This
Golden-brown Green Lentil and Vegetable Casserole bubbling in a baking dish, topped with melted Parmesan and fresh parsley. | awririndex.com

This Green Lentil and Vegetable Casserole is a wholesome, hearty dish that combines protein-rich green lentils with a vibrant medley of seasonal vegetables. Baked to perfection, it serves as a comforting vegetarian main course that is as nutritious as it is satisfying for any family dinner.

Golden-brown Green Lentil and Vegetable Casserole bubbling in a baking dish, topped with melted Parmesan and fresh parsley. Pin This
Golden-brown Green Lentil and Vegetable Casserole bubbling in a baking dish, topped with melted Parmesan and fresh parsley. | awririndex.com

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The combination of earthy lentils, savory tomato paste, and a blend of aromatic herbs like thyme and oregano creates a deep flavor profile. This European-inspired dish is flexible enough to use whatever seasonal vegetables you have on hand, ensuring a fresh and colorful meal every time.

Ingredients

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  • Lentils: 1 cup (200 g) green lentils, rinsed; 3 cups (720 ml) vegetable broth (use gluten-free if needed).
  • Vegetables: 2 tablespoons olive oil; 1 large onion, diced; 2 garlic cloves, minced; 2 medium carrots, diced; 2 celery stalks, diced; 1 red bell pepper, chopped; 1 zucchini, chopped; 1 cup (150 g) cherry tomatoes, halved; 1 cup (150 g) mushrooms, sliced.
  • Seasonings: 1 teaspoon dried thyme; 1 teaspoon dried oregano; 1 teaspoon smoked paprika; 1/2 teaspoon ground black pepper; 1/2 teaspoon salt (adjust to taste); 2 tablespoons tomato paste; 1 bay leaf.
  • Topping: 1/2 cup (50 g) grated Parmesan or vegetarian hard cheese (optional); 1/4 cup (15 g) fresh parsley, chopped.

Instructions

Step 1
Preheat oven to 375°F (190°C).
Step 2
In a large saucepan, heat olive oil over medium heat. Add onion and garlic, sauté for 3–4 minutes until softened.
Step 3
Add carrots, celery, bell pepper, zucchini, mushrooms, and cherry tomatoes. Cook for 5–6 minutes, stirring occasionally, until vegetables begin to soften.
Step 4
Stir in lentils, tomato paste, thyme, oregano, smoked paprika, bay leaf, salt, and pepper. Mix well.
Step 5
Pour in vegetable broth and bring to a boil. Reduce heat and simmer uncovered for 20 minutes, stirring occasionally, until lentils are just tender.
Step 6
Remove the bay leaf. Transfer the mixture to a large ovenproof baking dish (approx. 2-quart/2-liter).
Step 7
Sprinkle with grated cheese, if using.
Step 8
Bake uncovered for 25 minutes, until the top is golden and bubbling.
Step 9
Remove from oven, let rest for 5 minutes, then garnish with fresh parsley before serving.

Zusatztipps für die Zubereitung

Be sure to simmer the lentils until they are just tender before baking to ensure the perfect texture. Always remember to remove the bay leaf before transferring the mixture to the baking dish, and let the casserole rest for five minutes after baking to allow the flavors to meld.

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Varianten und Anpassungen

For a vegan version, simply omit the cheese or use a plant-based alternative. You can easily swap in other seasonal vegetables like sweet potato, spinach, or kale depending on what is available in your kitchen.

Serviervorschläge

This hearty casserole is best served alongside some crusty bread to soak up the savory juices, or with a fresh green salad on the side for a light and crisp contrast.

A hearty Green Lentil and Vegetable Casserole served from a rustic dish, paired with a crisp green salad on the side. Pin This
A hearty Green Lentil and Vegetable Casserole served from a rustic dish, paired with a crisp green salad on the side. | awririndex.com

Enjoy this nutritious and warming Green Lentil and Vegetable Casserole, a perfect balance of protein and vegetables that makes for a truly comforting meal.

Recipe Questions & Answers

Can I make this casserole ahead of time?

Yes, assemble the casserole up to 24 hours in advance and refrigerate. Add 10-15 minutes to baking time if cooking from cold.

What vegetables work best in this bake?

Root vegetables like carrots, celery, and onions provide excellent flavor foundations. Seasonal additions like sweet potato, spinach, or kale work wonderfully too.

How do I store leftovers?

Store in an airtight container in the refrigerator for 3-4 days. Reheat in the oven at 350°F (175°C) until warmed through, about 20 minutes.

Can I freeze this casserole?

Freeze before baking for best results. Wrap tightly and freeze for up to 3 months. Thaw overnight in the refrigerator before baking as directed.

What makes green lentils ideal for casseroles?

Green lentils hold their shape beautifully during baking, providing satisfying texture and protein. They absorb flavors from herbs and broth while maintaining a pleasant bite.

How can I add more protein?

Sprinkle with additional hard cheese, serve with a side of Greek yogurt, or add cooked beans like chickpeas along with the lentils for extra protein.

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Green Lentil Vegetable Casserole

Protein-packed lentils and vegetables baked with herbs for a wholesome vegetarian main.

Prep Time
20 min
Time to Cook
55 min
Overall Time
75 min
Created by Heidi Kaufman


Skill Level Easy

Cuisine type European

Makes 4 Portions

Dietary details Vegetarian Friendly

What You’ll Need

Lentils

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

Vegetables

01 2 tablespoons olive oil
02 1 large onion, diced
03 2 garlic cloves, minced
04 2 medium carrots, diced
05 2 celery stalks, diced
06 1 red bell pepper, chopped
07 1 zucchini, chopped
08 1 cup cherry tomatoes, halved
09 1 cup mushrooms, sliced

Seasonings

01 1 teaspoon dried thyme
02 1 teaspoon dried oregano
03 1 teaspoon smoked paprika
04 1/2 teaspoon ground black pepper
05 1/2 teaspoon salt
06 2 tablespoons tomato paste
07 1 bay leaf

Topping

01 1/2 cup grated Parmesan cheese, optional
02 1/4 cup fresh parsley, chopped

How to Make It

Step 01

Preheat oven: Preheat oven to 375°F.

Step 02

Sauté aromatics: In a large saucepan, heat olive oil over medium heat. Add onion and garlic, sauté for 3 to 4 minutes until softened.

Step 03

Cook vegetables: Add carrots, celery, bell pepper, zucchini, mushrooms, and cherry tomatoes. Cook for 5 to 6 minutes, stirring occasionally, until vegetables begin to soften.

Step 04

Combine base ingredients: Stir in lentils, tomato paste, thyme, oregano, smoked paprika, bay leaf, salt, and pepper. Mix well to combine.

Step 05

Simmer lentils: Pour in vegetable broth and bring to a boil. Reduce heat and simmer uncovered for 20 minutes, stirring occasionally, until lentils are just tender.

Step 06

Transfer to baking dish: Remove the bay leaf. Transfer the mixture to a large ovenproof baking dish.

Step 07

Add topping: Sprinkle with grated cheese, if using.

Step 08

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

Step 09

Rest and garnish: Remove from oven, let rest for 5 minutes, then garnish with fresh parsley before serving.

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Needed Tools

  • Large saucepan
  • Ovenproof baking dish
  • Cutting board and knife
  • Stirring spoon

Allergy details

Please double-check every ingredient for potential allergens and talk to a healthcare expert if you’re unsure.
  • Contains dairy if cheese is used. Omit or use vegan cheese for a dairy-free version.
  • Lentils are legumes; check for sensitivities.
  • Double-check broth and cheese labels for gluten or other allergens if required.

Nutrition Breakdown (for each serving)

These values are informative and shouldn't be used as medical advice—always consult a professional if you need specifics.
  • Calories: 320
  • Fats: 8 g
  • Carbohydrates: 47 g
  • Proteins: 16 g

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