Preheat oven to 375°F. Cook lasagna noodles according to package directions until al dente. Drain and lay flat on a baking sheet to prevent sticking.
In a large bowl, combine ricotta, pumpkin puree, 1/2 cup mozzarella, 1/4 cup Parmesan, egg, garlic, Italian seasoning, nutmeg, salt, and pepper. Mix until smooth and creamy.
Spread 1 cup of marinara sauce in the bottom of a 9x13-inch baking dish.
Spread about 1/4 cup of the pumpkin-ricotta mixture evenly over each lasagna noodle. Roll up tightly from one end.
Place roll-ups seam-side down in the prepared baking dish. Pour remaining marinara sauce over the top.
Sprinkle with remaining mozzarella and Parmesan cheese. Cover with foil and bake for 25 minutes.
Remove foil and bake for an additional 10 minutes until cheese is bubbly and golden. Let stand 5 minutes before serving. Garnish with fresh basil.