1-Step One: Prepare the Homemade Tomato Sauce Start by making the tomato sauce so flavors have time to develop while you prepare the other components. Heat a generous splash of olive oil in a saucepan over medium heat. Add 6 cloves of pressed garlic, a pinch of red pepper flakes, 2 teaspoons of Italian seasoning, and season with salt and black pepper to your taste. Sauté this mixture for 30 seconds to 1 minute, just until the garlic becomes fragrant but not browned. Pour in the entire 28-ounce can of organic crushed tomatoes, stir well to combine with the seasoned garlic mixture, and season again to taste. Let the sauce simmer uncovered for 15 minutes, allowing it to thicken slightly and the flavors to meld together beautifully. Once done, set the sauce aside while you prepare the filling and zucchini.

2-Step Two: Cook the Sausage and Mushroom Filling Remove the casing from 3 Italian sausage links, which should yield about 10 to 12 ounces of meat. Heat a non-stick skillet over medium-high heat and cook the sausage, breaking it into crumbles as it cooks. Continue until the sausage is nearly cooked through but not completely done, as it will finish cooking in the oven later. Add 6 ounces of sliced mushrooms to the skillet with the sausage. Sauté for 4 to 5 minutes until the mushrooms release their moisture and become tender. Press 3 cloves of garlic directly into the pan and cook for another minute until fragrant. Transfer this mixture to paper towels to cool and drain excess grease. The cooling step is important because hot filling would make the cheese melt prematurely and create messy roll ups.

3-Step Three: Mix the Cheese Filling Once the sausage and mushroom mixture has cooled sufficiently, combine it with the cheese filling ingredients. In a mixing bowl, add 1 cup of whole milk ricotta cheese, 1/4 cup of grated parmesan cheese, 1 cup of roughly chopped baby spinach leaves, and 1 teaspoon of Italian seasoning. Add the cooled sausage-mushroom mixture and season with salt and black pepper to taste. Mix everything thoroughly until well combined. The filling should be thick and hold together when scooped. Taste a small amount and adjust seasonings if needed, keeping in mind that the cheeses and sausage already contribute saltiness.

4-Step Four: Prepare the Zucchini Strips Preheat your oven to 425°F while you prepare the zucchini. Take 3 large zucchini and slice them very thin lengthwise, aiming for strips roughly 2 to 3 mm thick. You should get approximately 28 strips from the zucchini. A mandoline slicer creates the most consistent results, but a sharp knife and steady hand work well too. Sprinkle all the zucchini strips generously with salt and let them sit for 10 minutes. This crucial step draws out excess moisture from the zucchini, preventing soggy roll ups. After 10 minutes, blot each strip dry with paper towels, removing visible moisture beads and excess salt. Spread your prepared tomato sauce in the bottom of a 2½ to 3 quart baking dish, creating an even layer for the roll ups to rest on.

5-Step Five: Assemble the Roll Ups Now comes the fun part, assembling your zucchini rolls. Place a heaping tablespoon of the sausage-ricotta filling at the bottom edge of each zucchini strip. Gently but firmly roll the zucchini up around the filling, keeping it relatively tight so the filling stays enclosed. Place each rolled zucchini strip seam side down in the prepared baking dish. Arrange them in a single layer without overcrowding, though they can fit snugly against each other. Once all roll ups are in the dish, sprinkle 1 cup of grated whole milk mozzarella cheese evenly over the top.

6-Step Six: Bake and Serve Bake the zucchini roll ups uncovered for about 25 minutes. The cheese should be completely melted and slightly caramelized with golden brown spots on top. The zucchini becomes tender but still maintains enough structure to hold the filling. Remove from the oven and let the dish rest for 5 minutes before serving. This resting period allows the filling to set slightly, making serving easier. Garnish with fresh basil leaves or chopped parsley for a pop of color and fresh flavor. Serve hot, spooning some of the tomato sauce from the bottom of the dish over each roll up.