Slice the zucchinis lengthwise into strips about 1/8 inch thick. Lightly sprinkle salt over the zucchini slices and let them rest for 10-15 minutes to extract excess moisture. Afterward, pat the slices dry with a paper towel.
In a medium mixing bowl, blend together the ricotta cheese, half of the grated mozzarella, half of the grated Parmesan, the egg, minced garlic, and the dried Italian herbs. Season with salt and pepper, mixing until fully combined and smooth.
To prepare your baking dish, spread a thin layer of marinara sauce across the bottom of a 9x13 inch dish.
For each zucchini slice, take a generous tablespoon of the ricotta mixture and place it at one end of the slice. Roll the zucchini tightly, tucking in the filling as you go. Place the roll in the prepared baking dish seam-side down.
Once all the rolls are placed in the dish, evenly pour the remaining marinara sauce over the zucchini roll-ups. Top with the remaining mozzarella and Parmesan cheeses.
Cover the baking dish with aluminum foil to prevent the cheese from burning. Bake in the preheated oven for 25 minutes. After this time, remove the foil and continue baking for an additional 15 minutes, or until the cheese is melted, bubbly, and lightly golden.
When finished baking, let the roll-ups rest for 5 minutes to set. Garnish with fresh basil leaves just before serving.
Notes
For an elegant touch, serve the roll-ups on a rustic platter, drizzled with extra marinara sauce and a sprinkle of fresh herbs.