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Savory Tomato Zucchini & Rice Casserole – Easy, Flavorful, and Comforting

This Savory Tomato Zucchini and Rice Casserole is a hearty, flavorful, and wholesome dish perfect for weeknight dinners or meal prep! Tender zucchini, juicy tomatoes, and perfectly cooked rice baked together with savory seasonings make this an easy, family-friendly, one-dish meal everyone will love.
Prep Time 20 minutes
Cook Time 40 minutes
Total Time 1 hour
Course Main Dish, Side Dish
Cuisine American, Comfort Food, Vegetarian
Servings 8
Calories 280 kcal

Equipment

  • 9x13-inch baking dish
  • Skillet or sauté pan
  • Mixing bowls
  • Wooden spoon or spatula
  • Measuring Cups and Spoons
  • Optional: cheese grater, foil

Ingredients
  

Base

  • 1½ cups uncooked rice (long-grain or short-grain)
  • 3 cups water or vegetable broth (for cooking rice)

Vegetables & Aromatics

  • 2 medium zucchini, diced
  • 2 cups diced tomatoes (fresh or canned)
  • 1 small onion, finely chopped (optional)
  • 2 cloves garlic, minced
  • 1 bell pepper, diced (optional)

Cheese & Herbs

  • 1 cup shredded mozzarella or cheddar
  • ½ cup grated Parmesan or feta
  • 2 tsp dried basil or 2 tbsp fresh basil, chopped
  • 1 tsp dried oregano or 1 tbsp fresh oregano
  • Salt and black pepper, to taste
  • ½ tsp paprika (optional)

Optional Topping

  • ¼ cup breadcrumbs
  • 2 tbsp grated Parmesan

Instructions
 

  • Cook Rice: Prepare rice according to package instructions. Slightly undercook if desired, as it will finish baking in the casserole.
  • Sauté Vegetables: Heat 1 tbsp olive oil in a skillet over medium heat. Sauté zucchini, tomatoes, onions, garlic, and bell peppers (if using) until softened. Lightly salt zucchini to remove excess water.
  • Combine Ingredients: In a mixing bowl, combine cooked rice, sautéed vegetables, ¾ of the cheese, herbs, paprika, salt, and pepper. Mix gently.
  • Assemble Casserole: Transfer mixture to prepared 9×13-inch baking dish. Top with remaining cheese and optional breadcrumb topping.
  • Bake: Preheat oven to 375°F (190°C). Cover with foil and bake 20 minutes, then remove foil and bake 10–15 minutes until bubbly and golden on top.
  • Rest & Serve: Allow casserole to cool 5–10 minutes before serving.

Notes

  • Moisture Management: Lightly salt zucchini and drain excess liquid to prevent soggy casserole.
  • Protein Additions: Add cooked chicken, sausage, or beans to make it a full meal.
  • Grain Variations: Brown rice, quinoa, or farro can be substituted; adjust cooking times as needed.
  • Cheese Tips: Mix cheeses for best flavor; reserve some for topping to achieve a golden, bubbly finish.
  • Make-Ahead: Assemble in advance and refrigerate until ready to bake; casserole freezes well before or after baking.
Keyword cheesy rice bake, meal prep, tomato rice casserole, veggie casserole, weeknight dinner, zucchini casserole