Preheat your oven to 375°F (190°C) and grease a 9x13-inch baking dish.

Bring a large pot of salted water to a boil. Add ziti pasta and cook until al dente, about 8-10 minutes. Drain and set aside.

In a large skillet, heat olive oil over medium heat. Sauté minced garlic for 1-2 minutes, then add ground beef and cook until browned, about 5-7 minutes. Stir in marinara sauce and simmer for 5 minutes.

In a separate bowl, combine ricotta cheese, sour cream, and 1 cup of shredded mozzarella. Mix until creamy, seasoning with salt and pepper to taste.

Layer half of the cooked ziti, half of the cheese mixture, and half of the meat sauce in the prepared dish. Repeat layers, finishing with remaining mozzarella and a sprinkle of Parmesan.

Cover the dish with aluminum foil and bake for 20 minutes. Uncover and bake for an additional 10-15 minutes, until golden and bubbly.

Remove from the oven and let rest for 10 minutes before serving. Garnish with fresh basil if desired.