Baked Ziti With Ricotta

Name: Baked Ziti With Ricotta
Ingredients: 1 16 oz. (450g) package ziti pasta; 2 cups (16 oz. or 450g) ricotta cheese , divided; 1 cup (4 oz. or 115g) shredded mozzarella cheese (you can add more if you want it extra cheesy), divided; 1/2 cup grated Parmesan cheese , divided; 1 egg; 2 tablespoons olive oil; 1 large onion , chopped; 3 garlic cloves , minced; 1 28 oz. (800g) can crushed tomatoes with juice; 1 teaspoon Italian seasoning; 1/3 cup fresh basil leaves , packed, plus more for garnishing, finely chopped; salt and freshly ground pepper , to taste