Green Lentil and Vegetable Casserole

Featured in: Home Cooking Essentials

This wholesome casserole brings together tender green lentils and a colorful array of vegetables including carrots, zucchini, bell peppers, mushrooms, and spinach. Seasoned with thyme, oregano, and smoked paprika, then topped with Parmesan and breadcrumbs for a golden finish. Ready in just over an hour, this vegetarian main dish offers 16g of protein per serving and works beautifully for weeknight dinners or meal prep.

Updated on Thu, 29 Jan 2026 15:26:12 GMT
Golden-brown Green Lentil and Vegetable Casserole with bubbling cheese, fresh spinach, and colorful carrots peeking from beneath. Save
Golden-brown Green Lentil and Vegetable Casserole with bubbling cheese, fresh spinach, and colorful carrots peeking from beneath. | tirzakitchen.com

Experience the ultimate comfort with this Green Lentil and Vegetable Casserole. This hearty main dish is a nutritional powerhouse, combining protein-rich green lentils with a vibrant medley of seasonal vegetables and aromatic herbs. It is the perfect wholesome solution for chilly evenings when you crave something both filling and healthy.

Golden-brown Green Lentil and Vegetable Casserole with bubbling cheese, fresh spinach, and colorful carrots peeking from beneath. Save
Golden-brown Green Lentil and Vegetable Casserole with bubbling cheese, fresh spinach, and colorful carrots peeking from beneath. | tirzakitchen.com

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This easy-to-prepare dish brings international flair to your kitchen with a blend of smoked paprika, thyme, and oregano. Whether you are cooking for a family or meal-prepping for the week, this casserole is a reliable staple that tastes even better as the flavors meld.

Ingredients

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  • 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)

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 the best texture, do not overcook the lentils during the initial boiling phase; they should be 'al dente' as they will continue to soften during the baking process. Always use a 2-quart baking dish to ensure even heat distribution and a perfect golden-brown topping.

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Varianten und Anpassungen

For a completely vegan version, simply swap the Parmesan for a dairy-free alternative or nutritional yeast. This dish is also highly adaptable to the seasons—feel free to substitute zucchini or peppers with squash, sweet potatoes, or kale depending on what is fresh at your local market.

Serviervorschläge

This casserole is a complete meal on its own, but it pairs beautifully with a crisp green salad and some crusty gluten-free bread. If you are serving this for a special dinner, a light red wine like Pinot Noir complements the earthy tones of the lentils and mushrooms perfectly.

Hearty Green Lentil and Vegetable Casserole served in a white dish with crusty bread and a fresh salad. Save
Hearty Green Lentil and Vegetable Casserole served in a white dish with crusty bread and a fresh salad. | tirzakitchen.com

With its high fiber content and 320 calories per serving, this Green Lentil and Vegetable Casserole is a guilt-free way to enjoy a comforting, protein-packed meal. Enjoy the simple preparation and the deep, savory flavors of this international vegetarian favorite.

Recipe Questions & Answers

Can I use other types of lentils?

Green lentils hold their shape best during baking. Brown lentils work as a substitute, but red or yellow lentils become too soft and mushy for this dish.

How do I store leftovers?

Store in an airtight container in the refrigerator for up to 4 days. Reheat in the oven at 350°F for 15-20 minutes or microwave individual portions until heated through.

Can this be made ahead?

Absolutely. Prepare through step 7, cover tightly, and refrigerate up to 24 hours. Add 5-10 minutes to baking time if placing cold dish in the oven.

What vegetables work best as substitutes?

Sweet potatoes, butternut squash, kale, eggplant, or green beans all work wonderfully. Choose vegetables with similar cooking times or adjust sizes accordingly.

How can I make this vegan?

Simply replace the Parmesan with nutritional yeast or vegan cheese. The dish remains just as flavorful and satisfying without dairy.

Can I freeze this casserole?

Yes, freeze for up to 3 months. Cool completely, wrap tightly in foil and plastic wrap. Thaw overnight in the refrigerator before reheating.

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Green Lentil and Vegetable Casserole

Hearty casserole with green lentils, seasonal vegetables, and aromatic herbs baked to golden perfection.

Prep Time
20 min
Cook Time
50 min
Total Duration
70 min
Created by Tyson Harding


Skill Level Easy

Cuisine International

Makes 4 Servings

Dietary notes Vegetarian, Gluten-Free

What You 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

Topping

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

Directions

Step 01

Prepare oven: Preheat oven to 375°F.

Step 02

Cook lentils: 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 03

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

Step 04

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

Step 05

Add remaining vegetables and seasonings: 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

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

Step 08

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

Step 09

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

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Tools Needed

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

Allergy Info

Review all ingredients for allergens and check with your doctor if unsure.
  • Contains milk from Parmesan cheese
  • May contain gluten in breadcrumbs
  • Use vegan cheese and gluten-free breadcrumbs to accommodate dietary restrictions

Nutrition Details (per portion)

Nutritional data is for informational use and not a replacement for a healthcare provider.
  • Calories: 320
  • Fats: 8 g
  • Carbohydrates: 48 g
  • Proteins: 16 g

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