Preheat the oven to 350°F (175°C).

In a large bowl, combine the cooked spaghetti, eggs, 1 cup mozzarella cheese, and salt. Mix well to form the crust.

Press the spaghetti mixture into a greased pie dish to form a crust.

In a skillet, cook the ground beef and onion over medium heat until the meat is browned. Add garlic and cook for an additional minute.

Stir in the marinara sauce and Italian seasoning. Cook until heated through.

Pour the meat mixture into the spaghetti crust, spreading it evenly.

Top with the remaining 1 cup mozzarella cheese and the grated Parmesan cheese.

Bake for 30 minutes or until the cheese is bubbly and golden.

Garnish with fresh basil leaves before serving.