Follow these simple steps to create delicious Zucchini Rollatini:

1. Prepare the Zucchini: Preheat your oven to 375°F (190°C). Slice the zucchinis lengthwise into thin strips, about 1/8 inch thick.

2. Salt the Zucchini: Place the zucchini slices on a clean kitchen towel. Sprinkle them with salt and let them sit for about 15 minutes to draw out excess moisture.

3. Make the Filling: In a medium bowl, combine ricotta cheese, 1/2 cup mozzarella cheese, Parmesan cheese, egg, minced garlic, Italian seasoning, salt, and pepper. Mix well until creamy and combined.

4. Rinse the Zucchini: After 15 minutes, rinse the zucchini slices under cold water to remove the salt. Pat them dry with a paper towel.

5. Assemble the Rolls: Lay a zucchini slice on a flat surface. Spoon 1-2 tablespoons of the cheese mixture onto the wide end of the slice and roll it up.

6. Repeat: Continue this process until all the zucchini slices and filling are used.

7. Prepare the Baking Dish: Spread a thin layer of marinara sauce on the bottom of a baking dish. Arrange the rolled zucchini seams-side down in the dish.

8. Top with Sauce: Pour the remaining marinara sauce over the zucchini rolls, ensuring they are well-covered. Sprinkle the remaining mozzarella cheese on top.

9. Bake: Bake in the preheated oven for 30-35 minutes, or until the zucchini is tender and the cheese is bubbly and golden.

10. Cool Before Serving: Allow the dish to cool for a few minutes before serving. This helps the flavors meld and makes it easier to dish out the rolls.