1-Step One: Prepare Your Oven and Baking Dish Start by preheating your oven to 400 degrees F. This temperature ensures the zucchini cooks through properly while allowing the cheese to melt and develop a golden brown color. While the oven heats up, coat a large rectangular baking dish with cooking spray. This prevents the zucchini from sticking and makes cleanup much easier after dinner.

2-Step Two: Create the Zucchini Shells Cut each zucchini in half lengthwise to create your boat shapes. Use a sharp knife to trim off the stem ends, which makes the boats sit flat in the baking dish. Now comes the important part: scooping out the flesh. Use a small spoon or melon baller to carefully remove the center of each zucchini half, leaving about a 1/4-inch border all around to create sturdy shells that hold their shape during baking. Don’t throw away that scooped-out zucchini flesh! You can chop it up and add it to the meat filling for extra nutrition and less waste. Many home cooks find that incorporating the flesh back into the mixture adds subtle flavor and texture.

3-Step Three: Season the Zucchini Shells Place all your zucchini shells in the prepared baking dish, cut side up. Sprinkle them with the dried Italian seasoning, salt, and pepper. This step seasons the zucchini itself, ensuring flavor throughout the dish rather than just in the filling. Arrange the shells so they fit snugly but not overcrowded, which helps them cook evenly.

4-Step Four: Cook the Savory Filling Heat olive oil in a large skillet or pan over medium-high heat. Add the Italian sausage (remove the casings if present) and cook for 4-5 minutes, breaking up the meat with a wooden spoon as it browns. You want the sausage in small, crumbly pieces that will fit nicely inside your zucchini boats. Add the finely diced onion and continue cooking for another 4 minutes until the onion softens and becomes translucent. Then add the minced garlic and cook for just 30 seconds, stirring constantly. Garlic burns quickly and becomes bitter, so keep an eye on it. Season the mixture with additional salt and pepper to taste.

5-Step Five: Add Marinara and Simmer Pour the marinara sauce into the pan with your sausage mixture. Stir everything together and let it simmer for about 5 minutes. This simmering step allows the flavors to meld together and the sauce to slightly thicken. Choose your favorite marinara for this recipe, whether it’s homemade or your go-to store-bought brand.

6-Step Six: Stuff and Bake Spoon the meat mixture evenly into each zucchini shell. Don’t be shy here; pile that filling high! Once all the shells are stuffed, top each one with the shredded mozzarella cheese. The cheese creates that irresistible melted topping everyone loves. Place the baking dish in your preheated oven and bake for 25 minutes. The zucchini should be tender when pierced with a fork, and the cheese should be completely melted with some golden brown spots on top. Remove from the oven and sprinkle with fresh chopped parsley before serving. This adds a pop of color and fresh flavor that brightens the whole dish.