Whole30 Hearty Vegetable Casserole

Loaded with vibrant, nutrient-packed vegetables and infused with aromatic herbs, this Whole30 Hearty Vegetable Casserole is a wholesome, flavor-rich dish that's perfect for clean eating. Sautéed onions, bell peppers, zucchini, and carrots combine with tender broccoli and cauliflower florets in a savory tomato-herb sauce, creating a satisfying casserole that’s both comforting and healthy. This gluten-free, dairy-free recipe is Whole30-compliant, ideal for meal prep, and pairs beautifully with a crisp side salad or roasted protein. Ready in just over an hour, this one-dish wonder is as simple as it is delicious, making it a perfect choice for busy weeknights or family dinners. Don’t forget the fresh parsley garnish for a burst of color and freshness!

Nutriscore Rating: 80/100

Prep Time:20 mins

Cook Time:45 mins

Total Time:65 mins

Servings: 6

Ingredients

• 3 tablespoons olive oil
• 1 large yellow onion, chopped
• 2 medium bell peppers, chopped
• 2 medium zucchini, sliced
• 3 medium carrots, sliced
• 2 cups broccoli florets
• 2 cups cauliflower florets
• 4 cloves garlic cloves, minced
• 1 14-ounce can canned diced tomatoes
• 2 teaspoons dried oregano
• 1 teaspoon dried thyme
• 2 teaspoons dried basil
• 1 teaspoon salt
• 0.5 teaspoon black pepper
• 0.25 cup chopped fresh parsley

Directions

Step 1

Preheat your oven to 375°F (190°C).

Step 2

In a large skillet, heat the olive oil over medium heat.

Step 3

Add the chopped onion and bell peppers to the skillet. Sauté for about 5 minutes or until the onions become translucent.

Step 4

Stir in the zucchini, carrots, broccoli, cauliflower, and minced garlic. Cook for an additional 10 minutes, stirring occasionally, until the vegetables start to soften.

Step 5

Add the canned diced tomatoes, dried oregano, thyme, basil, salt, and pepper to the skillet. Stir well to combine all ingredients.

Step 6

Cook for another 5 minutes to allow the flavors to meld together.

Step 7

Transfer the vegetable mixture to a large casserole dish, spreading it evenly.

Step 8

Cover the casserole dish with aluminum foil and place it in the preheated oven.

Step 9

Bake the casserole for 25 minutes. Remove the foil and bake for an additional 5 minutes to lightly brown the top.

Step 10

Remove the casserole from the oven. Let it cool for a few minutes before serving.

Step 11

Garnish with fresh chopped parsley before serving. Enjoy your Whole30 Hearty Vegetable Casserole!

Nutrition Facts

Serving size	(1859.6g)

Amount per serving	% Daily Value*
Calories	965.1

Total Fat 57.3g	0%
Saturated Fat 10.0g	0%
Polyunsaturated Fat 7.4g
Cholesterol 7.9mg	0%
Sodium 3189.0mg	0%
Total Carbohydrate 100.1g	0%
Dietary Fiber 35.4g	0%
Total Sugars 51.4g
Protein 26.7g	0%

Vitamin D 0IU	0%
Calcium 580.3mg	0%
Iron 12.5mg	0%
Potassium 4187.6mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 50.4%

Protein: 10.4%

Carbs: 39.1%