Boil the lasagna sheets in salted water until al dente. Drain the cooked noodles and cover them with plastic wrap to prevent them from drying out.
Spread ricotta cheese over 3 cooked lasagna sheets, season with salt and pepper, and top each noodle with a spoonful of cooked spinach. Roll the lasagna sheets up and gently cut each one in half.
Lay out 3 cooked lasagna sheets. Put a slice of mozzarella cheese and 1 chicken tender on each noodle, roll the lasagna sheets up, and gently cut each one in half.
Lay out 3 cooked lasagna sheets and place 3 grilled zucchini slices on each noodle. Cut open the casings on 3 Italian sausages and evenly spread the meat over the zucchini slices on each noodle with a fork. Roll the lasagna sheets up and gently cut each one in half.
Preheat the oven to 400°F. Heat some olive oil in a Dutch oven and sauté the shallots and garlic. Stir in the chopped rosemary and tomato puree, season with salt and pepper, and let the sauce simmer. Remove the Dutch oven from the heat and let the sauce cool slightly. Sprinkle shredded mozzarella over the sauce and place the lasagna roll-ups upright in the Dutch oven.
For the crunchy topping, combine the bread crumbs, Italian seasoning, parmesan, and olive oil. Sprinkle the mixture over the lasagna roll-ups, transfer the Dutch oven to the oven, and bake at 400°F for 25 minutes.