Vegetable Casserole

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Olivia

Vegetable Casserole with Zucchini with Parsley on top, serve in a black pot with fresh tomato's on the side. close-up side view.

This vegetable casserole combines chopped vegetables with tomato sauce, olive oil, and vegetable broth. It bakes covered first to help the vegetables soften, then uncovered to let some moisture evaporate and the exposed vegetables lightly brown.

Choose the vegetable mixture carefully: carrots need smaller pieces than softer vegetables such as zucchini to cook at a similar rate. Check the firmest pieces for tenderness before serving. The basic recipe makes a vegetable side dish. Cooked beans or lentils can turn it into a more substantial variation, but their quantities and preparation should be specified separately.

Start with the Vegetable Cooking Guide:
https://letsveg.com/vegetable-cooking-guide

Video

Vegetable Casserole with Zucchini with Parsley on top, serve in a black pot with fresh tomato's on the side. close-up side view.
Olivia

Vegetable Casserole

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Vegetable casserole is a comforting baked dish made with mixed vegetables, tomato sauce, and simple seasoning for easy family meals.
Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Servings: 4
Course: Main Course
Cuisine: American
Calories: 83

Ingredients
  

  • 3–4 cups mixed vegetables chopped
  • zucchini, carrots, broccoli, cauliflower, peppers, onion
  • 2 tablespoons olive oil
  • 1 cup tomato sauce or crushed tomatoes
  • ½ cup vegetable broth or water
  • Salt and black pepper to taste
  • Cooked beans or lentils Optional
  • Garlic or herbs thyme, oregano Optional
  • Cheese or plant-based alternative Optional
  • Breadcrumbs for topping Optional

Equipment

Casserole Dish,
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09/23/2026 10:27 am GMT
Oven Baking pans

Cooking Instructions
 

  1. Preheat oven to 375°F (190°C).
  2. Lightly oil a baking dish.
  3. Place vegetables in a large bowl.
  4. Drizzle with olive oil and season with salt and pepper.
  5. Transfer vegetables to the baking dish.
  6. Pour tomato sauce and broth over the top.
  7. Stir gently to combine.
  8. Cover with foil and bake 25 minutes.
  9. Remove the foil and bake for another 15-20 minutes, until the firmest vegetable pieces are tender and the sauce has reduced slightly. Continue baking if needed; surface browning alone does not mean the vegetables are cooked through.
  10. Let rest briefly before serving.

Nutrition

Calories: 83kcalCarbohydrates: 5gProtein: 1gFat: 7gSaturated Fat: 1gPolyunsaturated Fat: 1gMonounsaturated Fat: 5gSodium: 198mgPotassium: 179mgFiber: 1gSugar: 3gVitamin A: 231IUVitamin C: 6mgCalcium: 21mgIron: 1mg

Notes

• Cut firm vegetables, such as carrots, smaller than softer vegetables so they can become tender at a similar time.
• Dry washed vegetables before assembling to avoid adding unnecessary water.
• Keep the dish covered during the first baking stage, then uncover as directed to allow moisture to evaporate.
• Check a piece of the firmest vegetable before removing the casserole from the oven.
• Taste your tomato sauce and broth before adding salt, since both may already be seasoned.
• Use the specified vegetable mixture for the stated cooking time. Different vegetables or frozen mixtures can change the moisture level and baking time.

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