Low-Carb Zucchini & Sausage Casserole
Low-Carb Zucchini & Sausage Casserole is a hearty, protein-packed comfort dish that delivers big flavor while keeping carbohydrates to a minimum. Tender zucchini, savory sausage, a rich creamy egg mixture, and layers of melted cheese come together to create a satisfying meal that’s perfect for busy weeknights, meal prep, or anyone following a low-carb or keto-friendly lifestyle. This casserole is easy to customize with extra vegetables and seasonings, making it a versatile family favorite.
Prep Time
15 minutes
Cook Time
40 minutes
Total Time
55 minutes
Servings
6
Calories
Approximately 420 calories per serving
Ingredients
Vegetables
3 medium zucchinis, sliced into half-moons
1 small onion, diced
2 garlic cloves, minced
Protein
500g ground Italian sausage, chicken sausage, turkey sausage, or beef sausage
Creamy Base
1 cup heavy cream
2 large eggs
Cheeses
1 cup shredded mozzarella cheese
½ cup grated Parmesan cheese
½ cup shredded cheddar cheese
Seasonings & Oil
1 tablespoon olive oil
1 teaspoon Italian seasoning
½ teaspoon paprika (optional)
Salt and black pepper, to taste
Optional Add-Ins
½ teaspoon crushed red pepper flakes
1 diced bell pepper
1 cup sliced mushrooms
1 cup fresh spinach
Fresh parsley or sliced green onions for garnish
Instructions
Prepare the Ingredients
Preheat the oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.
Slice the zucchini, dice the onion, and mince the garlic. If using additional vegetables, prepare them as well.
Cook the Sausage Mixture
Heat olive oil in a large skillet over medium heat.
Add the sausage and cook until browned, breaking it apart with a spoon as it cooks.
Add the onion and cook for 3 to 4 minutes until softened.
Stir in the garlic, Italian seasoning, paprika, and red pepper flakes if using. Cook for 1 minute until fragrant.
Add mushrooms, bell peppers, or spinach if desired and cook until slightly softened.
Prepare the Cream Mixture
In a medium bowl, whisk together the eggs and heavy cream until smooth.
Add a pinch of salt and black pepper and mix well.
Assemble the Casserole
Spread the zucchini evenly in the prepared baking dish.
Top with the cooked sausage mixture.
Pour the cream and egg mixture evenly over the casserole.
Sprinkle mozzarella, cheddar, and Parmesan cheese over the top.
Bake
Bake for 35 to 40 minutes, or until the center is set and the cheese is golden brown.
Allow the casserole to rest for 10 minutes before slicing and serving.
Garnish with fresh parsley or sliced green onions before serving.
Tips
Choose firm, fresh zucchini to prevent excess moisture in the casserole.
Lightly salt zucchini slices and let them sit for 10 minutes before cooking to draw out excess water.
Drain excess grease from the sausage after browning for a cleaner texture.
Use freshly shredded cheese for smoother melting and better flavor.
Allow the casserole to rest before serving so it slices neatly.
Avoid overbaking, which can make the zucchini too soft.
For extra richness, use full-fat heavy cream rather than half-and-half.
Cook mushrooms before adding them to reduce excess liquid.
A mixture of cheeses creates a more complex flavor profile.
Store leftovers in airtight containers for convenient meal prep.
Variations
Keto Version
Use full-fat sausage, heavy cream, and extra cheese to keep the dish keto-friendly.
Chicken Sausage Casserole
Substitute pork sausage with chicken sausage for a lighter meal.
Turkey Sausage Variation
Use lean turkey sausage for a lower-fat option.
Spicy Casserole
Add jalapeños, extra red pepper flakes, or spicy Italian sausage.
Mediterranean Style
Add spinach, feta cheese, and roasted red peppers.
Mushroom Lover’s Version
Double the mushrooms for extra texture and earthy flavor.
Mexican-Inspired Version
Use taco-seasoned sausage and top with pepper jack cheese.
Breakfast Casserole
Serve with scrambled eggs and add extra cheese for a brunch-friendly dish.
Greek Yogurt Version
Replace heavy cream with plain Greek yogurt for a lighter, tangier flavor.
Loaded Vegetable Casserole
Add bell peppers, spinach, mushrooms, and chopped broccoli for more nutrition.
Frequently Asked Questions
Can I make this casserole ahead of time?
Yes. Assemble the casserole up to one day in advance and refrigerate until ready to bake.
Can I freeze it?
Yes. Cool completely, wrap tightly, and freeze for up to 2 months.
How do I reheat leftovers?
Reheat in the oven at 350°F (175°C) or microwave individual portions.
Why is my casserole watery?
Zucchini naturally contains a lot of moisture. Salting and draining it beforehand helps prevent excess liquid.
Can I use yellow squash instead of zucchini?
Yes. Yellow squash works equally well in this recipe.
What sausage works best?
Italian sausage provides the most flavor, but chicken, turkey, or beef sausage are excellent alternatives.
Can I make it dairy-free?
You can substitute dairy-free cream and cheese alternatives, though the texture may vary.
Can I add more vegetables?
Absolutely. Bell peppers, mushrooms, spinach, kale, and broccoli are all great additions.
Is this recipe keto-friendly?
Yes. It is naturally low in carbohydrates and suitable for most keto meal plans.
How long will leftovers last?
Stored properly in the refrigerator, leftovers will remain fresh for up to 4 days.
Nutrition
(Per Serving)
Calories: 420
Protein: 26g
Carbohydrates: 7g
Fiber: 2g
Net Carbs: 5g
Fat: 32g
Saturated Fat: 14g
Cholesterol: 140mg
Sodium: 690mg
Calcium: 280mg
Vitamin A: 12% DV
Vitamin C: 20% DV
Conclusion
Low-Carb Zucchini & Sausage Casserole is a flavorful, filling, and easy-to-make dish that combines wholesome vegetables, savory sausage, creamy custard, and plenty of melted cheese. Perfect for low-carb and keto lifestyles, this casserole offers satisfying comfort-food flavor while remaining nutritious and versatile. Whether enjoyed fresh from the oven or reheated for meal prep throughout the week, it’s a dependable recipe that delivers delicious results every time.