Green Lentil and Vegetable Casserole

Featured in: Vegetarian Soul Dishes

This nourishing casserole brings together tender green lentils and a colorful array of fresh vegetables including carrots, zucchini, bell peppers, mushrooms, and spinach. The dish is elevated with dried thyme, oregano, and smoked paprika, then finished with a golden topping of Parmesan and breadcrumbs. Ready in just over an hour, this satisfying main dish serves four and works beautifully for meal prep or family dinners. The combination offers excellent plant-based protein, fiber, and vitamins while remaining naturally gluten-free.

Updated on Wed, 28 Jan 2026 02:19:59 GMT
Golden-brown Green Lentil and Vegetable Casserole with bubbly Parmesan and breadcrumbs fresh from the oven. Pin It
Golden-brown Green Lentil and Vegetable Casserole with bubbly Parmesan and breadcrumbs fresh from the oven. | sweetbatata.com

When the air turns crisp and the evenings grow longer, nothing warms the soul quite like a bubbling, savory casserole. This Green Lentil and Vegetable Casserole is a masterpiece of comfort, bringing together earthy, protein-rich lentils with a vibrant medley of seasonal vegetables and fragrant herbs. It is a wholesome main dish that proves vegetarian cooking can be both incredibly satisfying and deeply flavorful.

Golden-brown Green Lentil and Vegetable Casserole with bubbly Parmesan and breadcrumbs fresh from the oven. Pin It
Golden-brown Green Lentil and Vegetable Casserole with bubbly Parmesan and breadcrumbs fresh from the oven. | sweetbatata.com

The magic of this dish lies in the layers of flavor. From the aromatic base of sautéed onions and garlic to the subtle heat of smoked paprika and the freshness of wilted spinach, every ingredient plays a vital role. The lentils provide a robust texture, while the golden crust of Parmesan and breadcrumbs adds that essential satisfying crunch to every bite.

Ingredients

  • Lentils
  • 1 cup (200 g) dried green lentils, rinsed
  • 3 cups (720 ml) vegetable broth
  • Vegetables
  • 1 medium onion, diced
  • 2 cloves garlic, minced
  • 2 medium carrots, sliced
  • 1 medium zucchini, diced
  • 1 red bell pepper, diced
  • 1 cup (150 g) button mushrooms, sliced
  • 1 cup (150 g) cherry tomatoes, halved
  • 2 cups (60 g) fresh spinach, roughly chopped
  • Herbs & Seasonings
  • 2 tbsp olive oil
  • 1 tsp dried thyme
  • 1 tsp dried oregano
  • 1/2 tsp smoked paprika
  • 1/2 tsp ground black pepper
  • 1/2 tsp salt (or to taste)
  • Topping
  • 1/3 cup (30 g) grated Parmesan cheese (or vegan alternative)
  • 1/2 cup (40 g) gluten-free breadcrumbs (optional)
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Instructions

Step 1
Preheat the oven to 375°F (190°C).
Step 2
In a medium saucepan, combine lentils and vegetable broth. Bring to a boil, reduce heat, and simmer uncovered for 20–25 minutes until lentils are tender but not mushy. Drain any excess liquid.
Step 3
While lentils cook, heat olive oil in a large skillet over medium heat. Sauté onion and garlic for 2–3 minutes until fragrant.
Step 4
Add carrots, zucchini, bell pepper, and mushrooms. Cook, stirring occasionally, for 5–7 minutes until vegetables begin to soften.
Step 5
Stir in cherry tomatoes, spinach, thyme, oregano, smoked paprika, salt, and black pepper. Cook for another 2–3 minutes until spinach wilts.
Step 6
Combine cooked lentils and sautéed vegetables in a large mixing bowl. Mix well to combine.
Step 7
Transfer the mixture to a greased 2-quart (2-liter) baking dish. Sprinkle with Parmesan cheese and breadcrumbs (if using).
Step 8
Bake uncovered for 20–25 minutes, until the top is golden and the casserole is bubbling.
Step 9
Let rest for 5 minutes before serving.

Zusatztipps für die Zubereitung

To ensure uniform cooking, use a sharp chefs knife to dice your vegetables into even pieces. Using a 2-quart (2-liter) baking dish is essential for achieving the right depth, allowing the casserole to bubble throughout while the top becomes perfectly golden.

Varianten und Anpassungen

This recipe is highly versatile; you can easily swap in seasonal vegetables like butternut squash, sweet potatoes, or kale. For a strictly vegan version, simply use a dairy-free Parmesan alternative or nutritional yeast and ensure your breadcrumbs are vegan-friendly.

Serviervorschläge

Pair this hearty bake with a crisp green salad and a side of rustic, gluten-free bread to soak up the juices. For an elevated evening meal, serve it alongside a light red wine, such as a Pinot Noir, which beautifully complements the earthy green lentils.

Hearty Green Lentil and Vegetable Casserole served alongside a crisp green salad and rustic bread. Pin It
Hearty Green Lentil and Vegetable Casserole served alongside a crisp green salad and rustic bread. | sweetbatata.com

With its rich textures and nourishing ingredients, this Green Lentil and Vegetable Casserole is a reliable favorite for any night of the week. Whether you are meal-prepping or hosting a cozy dinner, this dish brings a sense of warmth and wholesomeness to the table that everyone will enjoy.

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Recipe Questions & Answers

Can I make this casserole ahead of time?

Yes, you can assemble the entire casserole up to 24 hours in advance and refrigerate before baking. You may need to add 5-10 minutes to the baking time if baking cold from the refrigerator.

What vegetables work best in this dish?

While the recipe calls for carrots, zucchini, bell peppers, and mushrooms, you can easily substitute seasonal vegetables like sweet potatoes, butternut squash, eggplant, or kale based on what's available.

How should I store leftovers?

Store leftover casserole in an airtight container in the refrigerator for up to 4 days. Reheat individual portions in the microwave or cover the baking dish with foil and warm in a 350°F oven.

Can I freeze this casserole?

Yes, this freezes well. Let it cool completely, wrap tightly in plastic wrap and foil, then freeze for up to 3 months. Thaw overnight in the refrigerator before reheating.

What can I serve with this casserole?

A simple green salad with vinaigrette balances the heartiness perfectly. Crusty gluten-free bread, steamed rice, or roasted potatoes also make excellent sides to complete the meal.

How do I make it completely vegan?

Simply use nutritional yeast, vegan Parmesan alternative, or omit the cheese entirely. The casserole remains delicious and satisfying without dairy.

Green Lentil and Vegetable Casserole

Protein-rich lentils baked with seasonal vegetables and aromatic herbs for a wholesome comforting meal.

Prep Time
20 min
Cook Time
50 min
Overall Time
70 min
Created by Nora James


Skill Level Easy

Cuisine International

Makes 4 Portions

Dietary Details Meat-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 & 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, or to taste

Topping

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

Cooking Steps

Step 01

Preheat oven: Set oven to 375°F (190°C).

Step 02

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

Step 03

Sauté aromatics: Heat olive oil in a large skillet over medium heat. Sauté onion and garlic for 2–3 minutes until fragrant.

Step 04

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

Step 05

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

Step 06

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

Step 07

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

Step 08

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

Step 09

Rest and serve: Let rest for 5 minutes before serving.

Equipment Needed

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

Allergy Notice

Check each ingredient for allergens and reach out to a healthcare professional if you have concerns.
  • Contains milk from Parmesan cheese.
  • May contain gluten in breadcrumbs.
  • Always check ingredient labels for potential allergens.

Nutrition Information (per portion)

Sweetbatata only offers this for informational use. Please don't treat it as personalized medical advice.
  • Caloric Value: 320
  • Fats: 8 g
  • Carbohydrates: 48 g
  • Proteins: 16 g