Preheat the oven to 350°F (175°C).

In a large skillet, heat olive oil over medium-high heat. Add onion and garlic, sauté for about 2 minutes until onion is translucent.

Add ground beef to the skillet, cook for 5-7 minutes until browned. Drain excess fat.

Stir in marinara sauce, Italian seasoning, red pepper flakes, salt, and pepper. Let simmer for 5 minutes.

Cook spaghetti noodles according to package instructions but reduce the cooking time by 3 minutes. Drain and mix with remaining marinara sauce.

In a separate bowl, combine cream cheese, ricotta, dried minced onion, garlic powder, dried parsley, and remaining Italian seasoning. Mix until smooth.

Spray casserole dish with cooking spray. Layer half of the spaghetti mixture, spread cheese mixture, then top with remaining spaghetti.

Spoon meat sauce over the top and sprinkle with mozzarella cheese.

Bake in preheated oven for about 30 minutes until cheese is melted and bubbly. Let cool before serving.