Ground Beef Zucchini Casserole Recipe

If you’re longing for a cozy, comforting meal that won’t weigh you down, look no further than this Ground Beef Zucchini Casserole! This dish pairs hearty, flavorful beef with tender zucchini and gooey mozzarella cheese for a casserole that’s both nourishing and incredibly satisfying. The combination of Italian seasoning and juicy tomatoes gives every bite a fresh, sun-kissed flavor, while the golden, melty topping brings everything together in the most craveable way. Whether you’re entertaining friends or savoring a simple family dinner, you’ll be coming back for seconds—maybe even thirds!

Ingredients You’ll Need

Every ingredient in this recipe has a role to play—there are no extras here! From rich ground beef to garden-fresh zucchini and a sprinkle of Italian seasoning, each component layers flavor and texture, making this dish as vibrant as it is delicious.

• 2 medium zucchini, sliced (about 2 pounds): These become irresistibly tender when baked and keep the casserole wonderfully moist without heaviness.
• 1 tbsp olive oil: Just a drizzle elevates the dish, ensuring the onions and beef get perfectly golden.
• 1 small onion (diced): Dice it small so it melts into the dish, adding savory sweetness.
• 2 garlic cloves (minced): For that unmistakable depth of flavor you only get from freshly minced garlic.
• 1 pound lean ground beef: The star protein, providing richness and a satisfying bite.
• 2 tsp Italian seasoning: A harmonious blend of herbs—think oregano, basil, and thyme—that infuses the casserole with classic Mediterranean notes.
• 1/2 tsp kosher salt: Lending flavor and helping to draw out moisture from the zucchini.
• 1/2 tsp black pepper: For just the right amount of warmth and kick in every forkful.
• 1 (28 ounce) can diced tomatoes, drained: These juicy tomatoes bind everything together and add a bright pop of color.
• 2 cups shredded mozzarella cheese: Melted, bubbly, and golden, it’s the finishing touch every casserole deserves.

How to Make Ground Beef Zucchini Casserole

Step 1: Prepare the Zucchini

Start off by slicing your zucchini into thick, hearty rounds—about half an inch is perfect. Sprinkle the slices with salt in a colander or sieve to help pull out excess water. This simple step keeps your Ground Beef Zucchini Casserole from turning watery, ensuring every layer comes out perfectly set.

Step 2: Remove Extra Moisture

Let the salted zucchini sit for 15 minutes. Don’t rush—this is when the magic happens. The salt draws out moisture, which helps your casserole hold its shape and delivers a more concentrated zucchini flavor.

Step 3: Rinse and Pat Dry

Give the zucchini a good rinse under cold water to wash off that extra salt, then pat each piece dry with paper towels. This quick step protects your dish from getting overly salty or soggy.

Step 4: Sauté the Onion

It’s time to build your flavor base! Heat olive oil in a large skillet over medium-high. Add diced onion and cook for about two minutes, just until it starts to turn translucent and sweet. This gently starts the flavor layering for your casserole.

Step 5: Brown the Beef

Next, add in the minced garlic and crumbly ground beef, breaking it up as it cooks. Keep stirring until the meat is browned and no pink remains—about five minutes. You’ll notice wonderful aromas filling the kitchen already!

Step 6: Add Tomatoes and Seasonings

Stir in the drained diced tomatoes, Italian seasoning, salt, and pepper. The tomatoes add juiciness while the herbs infuse every bite with nostalgic Italian flavor. Once everything’s combined, take the pan off the heat.

Step 7: Layer the Casserole

Preheat your oven to 350 degrees while you assemble. In an 8×8-inch baking dish, spread half of the beef mixture across the bottom. Top with half the zucchini slices, and then a layer of mozzarella. Repeat with the rest of the beef, zucchini, and finish with a final blanket of cheese.

Step 8: Bake

Slide your casserole into the oven and bake for 20 to 25 minutes. You’re looking for a golden, bubbly cheese topping that’s starting to brown at the edges—this is what makes the Ground Beef Zucchini Casserole irresistible!

Step 9: Let It Rest

Remove the casserole from the oven and let it rest for at least 10 minutes before digging in. This helps everything set so that every portion comes out neat, cheesy, and picture-perfect.

How to Serve Ground Beef Zucchini Casserole

Garnishes

Add a flourish before serving by scattering fresh basil or parsley over the top. A quick sprinkle of red pepper flakes or even a dusting of freshly grated Parmesan brings extra color and punchy flavor to the finished Ground Beef Zucchini Casserole.

Side Dishes

Pair your casserole with a crisp green salad or roasted vegetables for a balanced meal. If you’re feeling indulgent, some warm garlic bread or focaccia will help you scoop up every last flavorful bite.

Creative Ways to Present

Individual ramekins make for charming personal servings, perfect for dinner parties or meal prepping. Or try slicing the casserole into clean squares and stacking them on a platter for a buffet-style dinner where each piece looks as inviting as the last.

Make Ahead and Storage

Storing Leftovers

Leftover Ground Beef Zucchini Casserole keeps wonderfully. Simply cover the cooled baking dish with foil or transfer slices into airtight containers and refrigerate for up to 4 days—making it perfect for quick lunches or busy weeknight dinners.

Freezing

Want to freeze for later? Absolutely! Let the casserole cool completely, then wrap tightly in plastic wrap and foil, or portion into freezer-safe containers. It’ll keep for up to 2 months, and can be reheated straight from frozen for easy, stress-free meals.

Reheating

To reheat, place slices or the whole casserole in a 350 degree oven until warmed through (about 15 to 20 minutes). If microwaving, cover loosely and heat in 1-minute bursts so the cheese stays melty and delicious.

FAQs

Can I substitute ground turkey or chicken for the beef?

Absolutely! Ground turkey or chicken both work beautifully in this recipe. Just know that you might want to add an extra splash of olive oil and a bit more seasoning, since those meats are leaner and milder than beef.

How do I prevent the casserole from becoming watery?

Don’t skip the step where you salt, drain, rinse, and pat dry the zucchini. That’s key! It draws out the extra water in the zucchini, so your Ground Beef Zucchini Casserole bakes up set and savory, never soggy.

Can I add other vegetables?

Definitely! Feel free to mix in sliced mushrooms, bell peppers, or spinach with the beef mixture before layering. Just be sure to sauté off any excess moisture to keep the casserole from getting watery.

Is it gluten-free?

Yes, this casserole is naturally gluten-free as written! Just double-check your seasonings and canned tomatoes are gluten-free if you’re cooking for someone with allergies.

Can I prepare Ground Beef Zucchini Casserole ahead of time?

You sure can! Assemble the casserole up to the baking step, cover tightly, and refrigerate for up to a day before you’re ready to bake. Let it sit at room temperature while your oven heats so it bakes evenly.

Final Thoughts

There’s nothing quite like sharing a homemade Ground Beef Zucchini Casserole at the table—every cheesy, savory bite feels like a warm embrace. Give this recipe a try and watch it become a new staple on your family’s menu. Don’t be surprised when everyone asks for seconds!

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