Preheat the oven to 375F. Cook the ziti in salted boiling water until al dente, about 1-2 minutes less than the package directions. Drain.

Heat olive oil in a large skillet over medium heat. Add the onion and cook for 3-4 minutes until soft.

Add the ground beef and cook until browned, breaking it up with a spoon, about 6-8 minutes. Drain any excess fat.

Stir in the garlic and Italian seasoning, and cook for 1 minute until fragrant.

Add the marinara sauce and simmer for 5 minutes.

In a bowl, mix the ricotta, egg, Parmesan, salt, and pepper.

Combine the cooked ziti with the meat sauce, then fold in half of the ricotta mixture and half of the mozzarella.

Spread half the pasta mixture in a 9x13-inch baking dish, dollop the remaining ricotta mixture over the top, then add the rest of the pasta.

Top with the remaining mozzarella cheese.

Bake for 25-30 minutes until the cheese is melted and bubbling. Let rest for 10 minutes, then garnish with fresh basil before serving.