Step 1

Preheat the oven to 350 degrees F. Coat a 9"x13" pan with cooking spray.

Step 2

Warm the olive oil in a large pan over medium high heat. Add the ground beef and Italian sausage to the pan. Season with salt and pepper to taste.

Step 3

Cook the meat for 3 minutes, breaking it up into small pieces with a spoon or spatula. Add the diced onion to the pan. Cook for an additional 5 minutes or until meat is browned and cooked through and the onions are tender.

Step 4

Add the garlic to the pan and cook for 30 seconds. Add the marinara sauce and tomato sauce and bring the sauce to a simmer.

Step 5

Let the sauce simmer for 5 minutes or until slightly thickened.

Step 6

Place the ricotta, cream cheese, parmesan, salt, pepper and Italian seasoning in a bowl. Stir until well combined.

Step 7

Toss the cooked spaghetti with the sauce.

Step 8

Arrange half of the butter on the bottom of the dish, then place half the spaghetti on top.

Step 9

Spread the cheese layer on top of the pasta, then place the remaining half of the pasta on top.

Step 10

Arrange the remaining half of of the butter on top of the dish.

Step 11

Sprinkle the shredded cheese over the top.

Step 12

Bake covered for 20 minutes, then uncover and bake for another 15-20 minutes or until pasta is bubbly and cheese is melted and browned.

Step 13

Sprinkle with parsley. Let stand for 5-7 minutes, then serve.