This Keto Zucchini and Sausage Casserole is a comforting blend of savory, cheesy goodness that satisfies cravings without breaking your low-carb goals. Each bite delivers the perfect balance of tender zucchini and seasoned sausage, rounded out with creamy cheeses and herbs that make every forkful a delight.
Ideal for busy weeknights or a cozy dinner, this casserole comes together easily and bakes to golden perfection, creating a hearty meal that the whole family will love.
- Low carb and keto-friendly, perfect for maintaining dietary goals.
- Combines fresh vegetables with rich sausage and cheeses for balanced flavor.
- Simple preparation makes it great for busy schedules or meal prepping.
- Bakes into a warm, cheesy casserole that’s comforting and satisfying.
Ingredients
- Medium zucchinis: Two fresh zucchinis, sliced thin to ensure tenderness and even baking.
- Italian sausage: One pound of casings removed, choose mild or spicy based on preference for a flavorful protein base.
- Diced bell peppers: A cup of colorful peppers adds sweetness and texture contrast to the dish.
- Shredded mozzarella cheese: One cup provides creamy, melty topping for a luscious finish.
- Grated Parmesan cheese: Half a cup adds sharp, nutty flavor enhancing the cheese blend.
- Heavy cream: One cup to create a rich, velvety sauce that ties the casserole together.
- Minced garlic: Two cloves for aromatic depth and subtle pungency.
- Italian seasoning: One teaspoon brings fragrant herbs that complement the sausage perfectly.
- Salt and pepper: To taste, balancing and enhancing all flavors harmoniously.
- Olive oil: Used for cooking the sausage and vegetables, adding mild fruitiness.
Instructions
- Preheat oven and prepare pan
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Set your oven to 350°F (175°C) and grease a 9×9-inch baking dish. This ensures even cooking and prevents sticking, making cleanup easier afterward.
- Cook the sausage
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In a large skillet over medium heat, warm olive oil then add the sausage after removing casings. Break it up with a spoon and cook until browned and cooked through, about 7-10 minutes. Browning the sausage develops rich flavors through caramelization.
- Sauté garlic and bell peppers
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Add minced garlic and diced bell peppers to the browned sausage. Cook until peppers soften and the garlic is fragrant, about 3-4 minutes. This step layers extra sweetness and aroma into the base of the casserole.
- Combine casserole ingredients
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Transfer the cooked sausage, garlic, and peppers to a mixing bowl. Add zucchini slices, heavy cream, Italian seasoning, salt, and pepper. Stir gently to coat vegetables with cream and distribute seasonings evenly, ensuring every bite is flavorful.
- Assemble and top the casserole
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Pour the mixture into the prepared baking dish and spread evenly. Sprinkle shredded mozzarella and grated Parmesan on top, which creates a golden, cheesy crust when baked.
- Bake until bubbly and browned
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Place casserole in preheated oven and bake for 25-30 minutes until cheese is melted, bubbling, and slightly golden. Baking melds flavors and gives a satisfying texture contrast between creamy interior and crispy top.
- Cool and serve
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Allow the casserole to cool slightly before serving; this helps it set for easier slicing and enhances flavors as it rests.
- Using fresh zucchinis with moderate moisture helps avoid a watery casserole.
- Adjust spice level by choosing mild or spicy sausage based on your taste.
- Heavy cream adds richness but can be substituted with coconut cream for dairy-free variation.
Storage Tips
Store leftovers covered in the refrigerator for up to 3 days. Reheat gently in the oven or microwave to maintain texture and flavor. This casserole also freezes well for up to 1 month when sealed properly.
Serving Suggestions
Pair this casserole with a crisp green salad or steamed vegetables for a complete meal. It also works well alongside keto-friendly garlic bread or a simple tomato sauce drizzle for added zest.
- Drain excess grease from sausage after cooking to prevent sogginess in the casserole.
- Use a mandoline slicer for evenly sliced zucchini to ensure uniform cooking.
- For an extra cheesy crust, broil for the last 2 minutes but watch carefully to avoid burning.
- Let the casserole rest before serving to improve sliceability and flavor melding.
FAQs
- Can I use frozen zucchini in this casserole?
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Fresh zucchini is preferred due to moisture content; frozen zucchini tends to release excess water and may make the casserole watery.
- What can I substitute for Italian sausage?
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Ground turkey, chicken sausage, or plant-based sausage alternatives work well for different dietary preferences.
- Is this casserole suitable for meal prepping?
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Yes, it reheats well and can be portioned for easy grab-and-go keto lunches or dinners throughout the week.
- Can I add other vegetables?
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Absolutely! Mushrooms, spinach, or zucchini blossoms can be added for extra flavor and nutrients.
- How do I reduce the fat content?
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Use turkey sausage and reduce or substitute heavy cream with low-fat milk, but this may alter texture and richness.
- Can I make this recipe dairy-free?
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Replace heavy cream with full-fat coconut milk and use dairy-free cheese alternatives to make it dairy-free and keto-friendly.
- What type of cheese works best on top?
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Mozzarella and Parmesan give a great melt and flavor; you can also try provolone or gouda for a different twist.

Keto Zucchini Sausage Casserole
Equipment
- 1 skillet for cooking sausage and vegetables
- 1 9x9-inch baking dish for baking casserole
Ingredients
- 2 medium zucchinis sliced
- 1 pound Italian sausage casings removed
- 1 cup diced bell peppers any color
- 1 cup shredded mozzarella cheese
- 1/2 cup grated Parmesan cheese
- 1 cup heavy cream
- 2 cloves garlic minced
- 1 teaspoon Italian seasoning
- Salt and pepper to taste
- Olive oil for cooking
Instructions
- Preheat oven to 350°F (175°C).
- Heat olive oil in a large skillet over medium heat. Cook sausage until browned, breaking it up as it cooks.
- Add minced garlic and diced bell peppers to the skillet and cook until peppers are tender.
- In a large bowl, combine cooked sausage mixture, sliced zucchini, heavy cream, Italian seasoning, salt, and pepper. Mix well.
- Transfer mixture into a greased 9x9-inch baking dish and top with mozzarella and Parmesan cheese.
- Bake for 25-30 minutes until cheese is bubbly and golden. Let cool slightly before serving.
Notes
- Use mild or spicy Italian sausage to adjust flavor.
- Store leftovers refrigerated for up to 3 days.
- For extra crispiness, broil the casserole for 2 minutes before serving.