These oven baked 4-ingredient beef zucchini boats are the kind of simple appetizer that earns a permanent place in the family rotation, especially when early autumn zucchini is still plentiful and you want something warm, savory, and satisfying without a long shopping list. Hollowed zucchini halves become tidy little vessels for seasoned beef and melted mozzarella, giving you a dish that feels hearty yet not too heavy, with a nice balance of fresh vegetable flavor and rich filling.
Serve these warm straight from the casserole dish with a crisp green salad, roasted potatoes, or a platter of other casual appetizers for a gathering. They also pair nicely with marinara on the side for dipping, a loaf of garlic bread, or a simple tomato salad if you want to round them out into a light supper.
Oven Baked 4-Ingredient Beef Zucchini Boats
Servings: 6 appetizer servings
Ingredients
6 mini zucchini, halved lengthwise
1 pound ground beef
1 cup marinara sauce
1 1/2 cups shredded mozzarella cheese
Directions
1. Preheat the oven to 375°F. Lightly grease a glass casserole dish. Cut the mini zucchini in half lengthwise and use a small spoon to scoop out the centers, leaving a thin border so each half can hold the filling. Arrange the zucchini boats in the dish.
2. In a skillet over medium heat, cook the ground beef until fully browned, breaking it up with a spoon as it cooks. Drain off excess fat if needed, then stir in the marinara sauce and cook for 2 to 3 minutes until the mixture is thick and well combined.
3. Spoon the beef mixture evenly into each zucchini half, pressing it in gently so the filling stays in place. Top each boat with shredded mozzarella cheese.
4. Bake for 20 to 25 minutes, or until the zucchini is tender and the cheese is melted and bubbly with light golden spots. Let cool for 5 minutes before serving warm.
Variations & Tips
Use regular zucchini: If mini zucchini are not available, cut 3 medium zucchini in half lengthwise and prepare them the same way. You may need a few extra minutes of baking time since the larger pieces tend to be thicker.
Make it ahead: You can brown the beef and hollow the zucchini a day in advance. Store them separately in the refrigerator, then fill and bake just before serving for an easy party appetizer.
Add extra seasoning: Even with just four main ingredients, a pinch of salt, black pepper, Italian seasoning, or garlic powder can add more depth if you have them on hand. This is especially useful if your marinara is on the mild side.
Prevent watery zucchini: If your zucchini are especially moist, lightly sprinkle the hollowed halves with salt and let them sit for 10 minutes, then blot dry before filling. That small step helps keep the boats from releasing too much liquid during baking.