Step 1

Preheat the oven to 400 degrees F. Coat a 6 cup or larger baking dish with cooking spray. Bring a pot of water to a boil. Cook the tortellini according to package directions.

Step 2

While you wait for the water to boil and tortellini to cook, heat the olive oil in a large pan over medium high heat. Add the onion and cook for 3-4 minutes or until softened.

Step 3

Add the ground beef to the pan and season to taste with salt and pepper. Cook, breaking up the meat with a spatula, until done, approximately 4-5 minutes.

Step 4

Pour the marinara sauce into the pan with the beef and heat until warmed through.

Step 5

Drain the pasta and return to the pot. Pour the sauce over the pasta and toss to coat.

Step 6

Spoon the pasta into the prepared baking dish and sprinkle the cheese over the top. Bake for 20 minutes or until cheese is melted and starting to brown.

Step 7

Sprinkle with parsley and serve.