1-First Step: Prepare the Zucchini Ribbons Start by washing your zucchini thoroughly and patting them dry. Using a sharp knife or a mandoline slicer, slice each zucchini lengthwise into long, thin ribbons about 1/8-inch thick. Aim for consistent thickness so all your rolls cook evenly. Lay the zucchini ribbons on layers of paper towels and sprinkle them generously with kosher salt. This crucial step helps draw out excess moisture, which is the secret to avoiding watery rolls. Cover the salted zucchini with additional paper towels, then place a baking sheet on top to weigh them down. Let this sit for about 10 minutes to allow the salt to work its magic. Afterward, press firmly on the zucchini to remove as much moisture as possible.

2-Second Step: Cook the Sausage and Vegetables While the zucchini is releasing its moisture, heat a large skillet over medium-high heat. Remove the casings from your Italian sausage and break it into small pieces as you add it to the hot pan. Cook the sausage until it’s fully browned and no longer pink, approximately 7-8 minutes. Use a wooden spoon to break up any larger clumps as it cooks. Once done, transfer the sausage to a plate or bowl and set aside. Reduce the heat to medium and add the olive oil to the same skillet. Add the minced garlic and cook for about 30-60 seconds until fragrant, being careful not to burn it. Add the chopped spinach and sauté for 2-3 minutes until wilted. Remove the pan from heat and mix the cooked spinach with the sausage you set aside earlier.

3-Third Step: Prepare the Filling In a large mixing bowl, combine the sausage and spinach mixture with the ricotta cheese, shredded mozzarella, 1/2 cup of the grated Parmesan, egg, chopped basil, and crushed red pepper flakes. Mix everything thoroughly until well combined. Taste a small amount and adjust the seasoning if needed, keeping in mind that the cheese and sauce will add additional saltiness.

4-Fourth Step: Assemble the Zucchini Rolls Preheat your oven to 375°F. Spread about a cup of the Arrabbiata sauce evenly across the bottom of your baking dish or skillet. If you’re using unseasoned cast iron, consider switching to enameled cast iron or ceramic bakeware to prevent any reaction between the acidic sauce and the iron. Pat your prepared zucchini ribbons dry one more time with paper towels to ensure they’re as moisture-free as possible. Take a zucchini ribbon and spread approximately 2 tablespoons of the filling mixture evenly along its length, leaving about half an inch of space at one end. Starting from the filled end, gently roll up the zucchini, being careful not to tear it, and place the roll seam-side down in the prepared dish. Repeat this process until all the zucchini and filling are used, arranging the rolls closely together in the dish. This tight packing helps the rolls maintain their shape during baking.

5-Final Step: Bake and Serve Spoon the remaining Arrabbiata sauce over the top of the zucchini rolls, ensuring each roll gets some coverage. Sprinkle the remaining 1/4 cup of Parmesan cheese over everything for a flavorful, golden topping. Place the dish in your preheated oven and bake for 25 minutes, or until the cheese has melted and developed a light golden brown color. If you prefer a bubbly, browned top, switch your oven to broil for the last 1-2 minutes, watching closely to prevent burning. Remove the dish from the oven and let it rest for about 5 minutes before serving. Garnish with additional fresh basil leaves for a pop of color and fresh flavor. Serve the zucchini rolls warm, with extra sauce on the side if desired.