This Stovetop Zucchini Casserole is a quick and flavorful one-pan dish that combines tender zucchini, savory sausage, and a blend of spices. Topped with melted sharp cheddar cheese, it’s a comforting meal that’s perfect for a busy weeknight. The simplicity of this casserole makes it an easy go-to dinner, packed with delicious flavors that everyone will enjoy.
Why You’ll Love This Recipe
Stovetop Zucchini Casserole is a satisfying and hearty dish that’s full of flavor. The zucchini and onion create a great base, while the stewed tomatoes and long grain rice add texture and depth. The addition of sharp cheddar cheese on top makes this casserole melt-in-your-mouth delicious. It’s a one-pan wonder that’s not only easy to prepare but also packed with healthy vegetables. Perfect for those looking for a simple, balanced meal that’s ready in just 20 minutes!

Ingredients
- 1 tablespoon canola oil
- 3 medium zucchini, thinly sliced
- 1 medium onion, chopped
- 1 can (14-1/2 ounces) stewed tomatoes, cut up
- 1 package (8.8 ounces) ready-to-serve long grain rice
- 1 teaspoon prepared mustard
- 1/2 teaspoon garlic salt
- 1/4 teaspoon pepper
- 1 cup shredded sharp cheddar cheese
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
Directions
- Cook the Vegetables: In a large skillet, heat the canola oil over medium heat. Add the sliced zucchini and chopped onion. Cook, stirring occasionally, for 5-7 minutes or until the vegetables are tender.
- Add the Sausage and Other Ingredients: Stir in the stewed tomatoes, ready-to-serve rice, prepared mustard, garlic salt, and pepper. Bring the mixture to a boil, then reduce the heat to a simmer. Cover the pan and let it simmer for 5 minutes to allow the flavors to blend.
- Add the Cheese: Remove from heat and sprinkle the shredded sharp cheddar cheese over the top of the casserole. Let it stand, covered, for 5 minutes or until the cheese is melted.
Servings and Timing
- Servings: 4
- Prep time: 5 minutes
- Cook time: 15 minutes
- Total time: 20 minutes
Variations
- Add Protein: For extra protein, you can add cooked sausage, ground turkey, or chicken to the casserole.
- Make it Spicy: Add a pinch of red pepper flakes or some chopped jalapeños to the mix for a bit of heat.
- Vegetarian Option: Omit the sausage and use vegetable broth instead of the stewed tomatoes for a vegetarian version of this dish.
Storage/Reheating
- Storage: Leftovers can be stored in an airtight container in the refrigerator for up to 3 days.
- Reheating: Reheat in the microwave for 1-2 minutes or on the stovetop over low heat. You may want to add a splash of water to keep the casserole from drying out.

FAQs
1. Can I use fresh tomatoes instead of stewed tomatoes?
Yes, you can use fresh diced tomatoes in place of stewed tomatoes. Just be sure to cook them down a little bit longer to get a similar consistency.
2. Can I make this casserole ahead of time?
Yes, you can prepare the casserole up to the point of adding the cheese. Store it in the refrigerator and add the cheese when you’re ready to serve. Then, heat it on the stovetop or in the oven until the cheese melts.
3. Can I use a different type of cheese?
Absolutely! You can substitute the sharp cheddar with other cheeses like mozzarella, Monterey Jack, or gouda for a different flavor profile.
4. How do I make this casserole spicier?
To make the casserole spicier, add some chopped fresh chili peppers or sprinkle in some chili powder or cayenne pepper along with the garlic salt.
5. Can I add more vegetables to this casserole?
Yes, feel free to add more vegetables like bell peppers, mushrooms, or spinach to the skillet when cooking the zucchini and onion.
6. Can I use instant rice instead of ready-to-serve rice?
Ready-to-serve rice is ideal for this recipe since it’s already cooked. However, if you use instant rice, be sure to adjust the cooking time and add the appropriate amount of water.
7. Can I freeze this casserole?
Yes, you can freeze this casserole. Allow it to cool completely, then store it in an airtight container in the freezer for up to 2-3 months. Reheat in the oven or microwave when ready to serve.
8. Can I use a different oil instead of canola oil?
Yes, you can use olive oil, avocado oil, or any other cooking oil you prefer in place of canola oil.
9. How can I make this dish more filling?
For a more filling meal, serve this casserole alongside a side salad or some crusty bread.
10. Can I use brown rice instead of white rice?
Yes, you can use brown rice, but keep in mind that it will require a longer cooking time, so adjust accordingly.
Conclusion
This Stovetop Zucchini Casserole is an easy and delicious one-pan meal that’s full of flavor and nutrients. The tender zucchini, savory sausage, and melted cheese come together in a dish that’s both comforting and satisfying. With just a few ingredients and minimal prep time, this casserole is a perfect weeknight dinner option for those looking for something quick, healthy, and tasty!
Print
Stovetop Zucchini Casserole Recipe
- Total Time: 20 minutes
- Yield: 4 servings
Description
This Stovetop Zucchini Casserole is a quick and flavorful one-pan dish that combines tender zucchini, savory sausage, and a blend of spices. Topped with melted sharp cheddar cheese, it’s a comforting meal that’s perfect for a busy weeknight. The simplicity of this casserole makes it an easy go-to dinner, packed with delicious flavors that everyone will enjoy.
Ingredients
1 tablespoon canola oil
3 medium zucchini, thinly sliced
1 medium onion, chopped
1 can (14-1/2 ounces) stewed tomatoes, cut up
1 package (8.8 ounces) ready-to-serve long grain rice
1 teaspoon prepared mustard
1/2 teaspoon garlic salt
1/4 teaspoon pepper
1 cup shredded sharp cheddar cheese
Instructions
- In a large skillet, heat the canola oil over medium heat. Add the sliced zucchini and chopped onion. Cook, stirring occasionally, for 5-7 minutes or until the vegetables are tender.
- Stir in the stewed tomatoes, ready-to-serve rice, prepared mustard, garlic salt, and pepper. Bring the mixture to a boil, then reduce the heat to a simmer. Cover the pan and let it simmer for 5 minutes to allow the flavors to blend.
- Remove from heat and sprinkle the shredded sharp cheddar cheese over the top of the casserole. Let it stand, covered, for 5 minutes or until the cheese is melted.
Notes
- For extra protein, you can add cooked sausage, ground turkey, or chicken to the casserole.
- Add a pinch of red pepper flakes or some chopped jalapeños to the mix for a bit of heat.
- For a vegetarian version, omit the sausage and use vegetable broth instead of the stewed tomatoes.
- Prep Time: 5 minutes
- Cook Time: 15 minutes
- Category: Main Dish
- Method: Sautéing, Simmering
- Cuisine: American
Nutrition
- Serving Size: 1/4 of recipe
- Calories: 210 kcal
- Sugar: 6 g
- Sodium: 480 mg
- Fat: 13 g
- Saturated Fat: 6 g
- Unsaturated Fat: 7 g
- Trans Fat: 0 g
- Carbohydrates: 15 g
- Fiber: 3 g
- Protein: 7 g
- Cholesterol: 25 mg