If you are looking for a delicious, hearty dish that keeps carbs low without skimping on flavor, the Ground Beef Zucchini Casserole (Low Carb & Easy) Recipe is an absolute must-try. This comforting casserole blends seasoned ground beef, tender zucchini, and gooey melted cheese into a warm, satisfying one-dish meal that’s as easy to prepare as it is to enjoy. Perfect for busy weeknights or whenever you want a fuss-free dinner that feels like a hug on a plate!

Ingredients You’ll Need

The image shows a rectangular metal baking tray filled with a layered dish. The bottom layer is golden-brown baked pasta or casserole. On top of this, there is a layer of evenly sliced round pieces of zucchini, laid out in a close pattern covering the whole surface. Some fresh green basil leaves are scattered on top of the zucchini slices. The tray is placed on a white marbled surface with a beige textured cloth partially under the tray. Photo taken with an iphone --ar 4:5 --v 7

Each ingredient in this recipe plays a crucial role in building layers of texture and flavor while keeping the dish beautifully balanced and low carb. From the savory beef to the fresh zucchini and sharp cheeses, simplicity is key and every component shines.

1 lb ground beef: Provides a rich, meaty base that’s hearty and protein-packed.
2 medium zucchini, sliced or diced: Adds a fresh, tender crunch while keeping carbs down and color vibrant.
1 tbsp olive oil: Helps soften the onions and garlic while enhancing depth of flavor.
1/2 cup onion, diced: Brings a subtle sweetness to the savory mix.
2 cloves garlic, minced: Infuses the casserole with aromatic warmth and zest.
1 cup marinara sauce (low-carb): Offers a bright, tangy tomato base without extra sugars.
1 tsp Italian seasoning: A blend of herbs that perfectly complements beef and zucchini.
1/2 tsp salt: Enhances all the flavors naturally.
1/4 tsp black pepper: Adds just the right amount of mild spice and earthiness.
1 1/2 cups shredded mozzarella cheese: Brings gooey, melty goodness on top.
1/4 cup grated Parmesan cheese: Offers a sharp, nutty finish that crowns the casserole beautifully.

How to Make Ground Beef Zucchini Casserole (Low Carb & Easy) Recipe

Step 1: Prepare Your Oven and Baking Dish

Start by preheating your oven to 375°F (190°C). This ensures the perfect baking temperature for that golden cheese crust. Lightly grease a baking dish so your casserole won’t stick and will come out perfectly easy to serve.

Step 2: Sauté Aromatics and Brown the Beef

In a large skillet, heat the olive oil over medium heat. Toss in the diced onions and cook until they soften and become fragrant, about 3 minutes. Then add the garlic, letting it cook for just 30 seconds to release its wonderful aroma. Next, add the ground beef, breaking it up with your spatula. Cook until it’s beautifully browned and cooked through, then drain any excess fat to keep things light.

Step 3: Build the Flavor Base

Stir the marinara sauce into the beef along with Italian seasoning, salt, and black pepper. This is where all those savory and tangy flavors come together, creating an irresistible sauce that binds the casserole.

Step 4: Add Zucchini and Cook Briefly

Once your beef mixture is well combined, add the sliced or diced zucchini. Let it cook for just 2–3 minutes until the zucchini is slightly tender but still holds a bit of that fresh crunch, so it doesn’t get mushy in the oven.

Step 5: Assemble and Bake

Transfer the beef and zucchini mixture into your prepared baking dish, spreading it out evenly. Generously sprinkle the shredded mozzarella and grated Parmesan cheese over the top. Bake uncovered in the oven for 25–30 minutes until the cheese is bubbling and lightly golden, creating that perfect melt and crust you crave.

Step 6: Let It Rest

Once baked, let your casserole rest for 5 minutes before serving. This allows the flavors to settle and the cheese to firm up just enough so you can serve clean, beautiful slices.

How to Serve Ground Beef Zucchini Casserole (Low Carb & Easy) Recipe

The dish is a baked casserole in a white rectangular baking dish with two short handles. It has multiple layers starting with a base of orange-red sauce mixed with browned ground meat, followed by a thick layer of sliced zucchini rounds layered evenly across the top. The cheese layer on top is melted and bubbly with slight browning and golden spots, covering both the zucchini and meat beneath. The cheese looks creamy and stringy with a few scattered herbs and spices for texture. The edges of the dish show some browned sauce and cheese that has caramelized from baking. The background is a white marbled surface with a red cloth partially visible. photo taken with an iphone --ar 4:5 --v 7

Garnishes

Adding fresh herbs like chopped parsley or basil sprinkled on top can brighten the dish and add a pop of color. If you love a slight crunch, toasted pine nuts or crushed walnuts add delightful texture contrast.

Side Dishes

This casserole stands strong as a main, but pairing it with a crisp green salad or steamed green beans makes for a well-rounded, nutrient-packed meal. Cauliflower rice or a simple garlic butter sautéed spinach also complement the low-carb theme beautifully.

Creative Ways to Present

For a fun twist, try serving individual portions in mini ramekins to impress guests or craving-control yourself. You can also layer the casserole in a clear glass dish for a visually appealing presentation showcasing the colorful layers of beef, zucchini, and cheese.

Make Ahead and Storage

Storing Leftovers

Keep leftovers in an airtight container in the refrigerator for up to 3-4 days. This Ground Beef Zucchini Casserole (Low Carb & Easy) Recipe retains its flavor well, making it perfect for quick lunches or dinners later in the week.

Freezing

This casserole freezes wonderfully. Portion it out into freezer-safe containers and freeze for up to 2 months. When you’re ready to enjoy, thaw overnight in the fridge before reheating.

Reheating

Reheat leftovers in the oven at 350°F (175°C) for about 15 minutes for the best cheesy melt and even warming. Alternatively, a microwave works well for convenience, but be sure to cover loosely to retain moisture.

FAQs

Can I use other types of cheese?

Absolutely! While mozzarella and Parmesan are classic here, feel free to experiment with cheddar, gouda, or a spicy pepper jack to tailor the casserole to your taste preferences.

Is this casserole suitable for a keto diet?

Yes, it is! The recipe focuses on low-carb ingredients like zucchini and ground beef, which fit perfectly within keto guidelines, making it a delicious and keto-friendly meal.

Can I substitute the ground beef with another protein?

You can swap ground beef for ground turkey, chicken, or even plant-based alternatives for a different flavor or to suit dietary needs without compromising the dish’s structure.

What if my zucchini releases too much water?

Salt the zucchini lightly before cooking and pat it dry to reduce excess moisture. This keeps the casserole from becoming watery and maintains a nice texture.

How can I add more veggies to this casserole?

Feel free to add diced bell peppers, mushrooms, or spinach for added nutrition and variety. Just sauté them with the onions and garlic for the best flavor integration.

Final Thoughts

You truly can’t go wrong with this Ground Beef Zucchini Casserole (Low Carb & Easy) Recipe. It’s comfort food at its best — hearty yet healthy, simple to make yet bursting with flavor, and perfectly suited for anyone looking to enjoy an easy, wholesome meal without the carb overload. I can’t wait for you to try it out and make it a regular favorite in your kitchen!