Ground Beef & Zucchini Casserole
Some casseroles are heavy and carb-loaded. This one? Light, packed with flavor, and just the right amount of indulgent. Think savory seasoned beef, layers of tender zucchini, rich marinara, and plenty of melty mozzarella, all baked together into something ridiculously satisfying. This ground beef and zucchini casserole is currently one of my favorite easy dinners, and I think you’ll love it too!
It’s the kind of dish that feels like comfort food but won’t leave you feeling sluggish. Bonus: It’s naturally low-carb, gluten-free, and easy to throw together on a busy weeknight. If you’ve got extra zucchini lying around (or just need a break from pasta), this casserole is proof that simple ingredients can turn into something seriously delicious.
Ingredients
- Lean ground beef
- Onion
- Garlic
- Marinara sauce (if you’re gluten free, make sure you always double check the ingredients for store-bought marinara – most are indeed gluten free, but not all!)
- Italian seasoning
- Salt
- Black pepper
- Zucchini
- Mozzarella cheese
- Fresh parsley
Step-by-Step Guide for Making Beef & Zucchini Casserole
Looking for the printable recipe card? You’ll find it at the bottom of this post, and it covers absolutely everything you need to make this recipe at home, including ingredients, measurements, and instructions. In this section, I’m going to share the step-by-step process alongside some photos to help guide you through…
- Preheat the oven to 375°F/190°C, and grease a 9×13-inch baking dish.
- Dice your onion and slice the zucchinis.
- Add the ground beef to a large skillet, and cook over medium heat, until browned, breaking it up as it cooks.
- Add the onion and garlic, and continue cooking for about a minute. Stir the sauce and seasonings into the meat mixture. Set aside.
- Arrange the zucchini slices in rows in the baking dish, slightly overlapping each other.
- Pour the meat and sauce over the zucchini, then sprinkle with mozzarella.
- Bake uncovered for 20 minutes.
- Sprinkle with fresh parsley, and allow the casserole to stand for 5 minutes before serving.
Serving Ideas & Side Dishes
This Ground Beef & Zucchini Casserole is hearty enough to stand on its own, but the right side dish can take your meal to the next level. Whether you’re craving something light and fresh or warm and comforting, here are some perfect pairings:
Bread & Grains
✔ Garlic Bread or Breadsticks – A crispy, buttery side to soak up all that marinara goodness. Try homemade garlic bread or warm, crusty sourdough.
✔ Cauliflower Rice – A great low-carb option that adds texture and soaks up the flavors beautifully.
✔ Quinoa or Farro – If you want something hearty but not too heavy, a side of nutty quinoa or farro makes a great pairing.
Salads
✔ Italian Chopped Salad – A mix of romaine, cherry tomatoes, olives, red onion, and a zesty Italian dressing keeps things fresh and balanced.
✔ Arugula with Lemon Vinaigrette – Peppery arugula with a light lemon dressing adds brightness to contrast the richness of the casserole.
✔ Classic Caesar Salad – A creamy, garlicky Caesar with crisp romaine and parmesan is always a winner.
Roasted & Sautéed Veggies
✔ Roasted Brussels Sprouts – Crispy, slightly caramelized Brussels sprouts add a delicious contrast to the casserole’s creaminess.
✔ Garlic Green Beans – Sautéed with a little olive oil, garlic, and lemon, these add a fresh, crisp bite.
✔ Balsamic Glazed Carrots – Roasted carrots with balsamic bring a touch of sweetness that balances out the savory flavors of the dish.
Light & Refreshing Sides
✔ Cucumber & Tomato Salad – A simple mix of sliced cucumbers, cherry tomatoes, red onion, and a light vinaigrette keeps things cool and fresh.
✔ Caprese Salad – Fresh mozzarella, basil, and juicy tomatoes drizzled with balsamic glaze make for a light, refreshing pairing.
✔ Steamed Asparagus with Lemon – Simple but elegant, asparagus with a squeeze of fresh lemon brings a bright, clean contrast.
Ground Beef & Zucchini Casserole
Ingredients
- 1 lb lean ground beef
- 1 small onion diced
- 1 tsp garlic minced
- 1 cup marinara sauce
- 1 teaspoon Italian seasoning
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 2 medium zucchinis sliced
- 1 1/2 cups mozzarella cheese shredded
- Fresh parsley to garnish
Instructions
- Preheat the oven to 375°F/190°C, and grease a 9×13-inch baking dish.
- Dice your onion and slice the zucchinis.
- Add the ground beef to a large skillet, and cook over medium heat, until browned, breaking it up as it cooks.
- Add the onion and garlic, and continue cooking for about a minute. Stir the sauce and seasonings into the meat mixture. Set aside.
- Arrange the zucchini slices in rows in the baking dish, slightly overlapping each other.
- Pour the meat and sauce over the zucchini, then sprinkle with mozzarella.
- Bake uncovered for 20 minutes.
- Sprinkle with fresh parsley, and allow the casserole to stand for 5 minutes before serving.
This Ground Beef & Zucchini Casserole proves that simple ingredients can create something seriously satisfying.Whether you’re making it for a quick weeknight dinner, meal prep, or a cozy family meal, it’s a flavorful, low-carb option that doesn’t skimp on comfort. Try it once, and it just might become a regular in your dinner rotation!
If you make this recipe, let me know in the comments! I’d love to hear how it turned out and what sides you paired it with.
