Step 1

Preheat oven to 350 F.

Step 2

Bring a large pot of water to a boil over medium high heat. Add tortellini and cook according to package directions, about 8-10 minutes. Drain with a colander, and set aside.

Step 3

Meanwhile, heat oil in a large cast-iron skillet (or oven safe skillet) for 2 minutes over medium-high heat until the hot oil sizzles and shimmers. Add sausage and cook for 5-7 minutes until browned. Break the sausages into small pieces using a spatula.

Step 4

Add onions and sauté until tender, about 3-4 minutes. Stir well to combine.

Step 5

Add in tomato sauce, parsley, salt and pepper. Stir well to mix and bring to a simmer. Turn the heat down to low, and simmer uncovered for 5 minutes.

Step 6

Add in the cooked tortellini and stir well to fully coat it in sauce. Sprinkle shredded mozzarella and grated Parmesan evenly on top of the tortellini.

Step 7

Transfer the skillet into the oven and bake for 10-12 minutes, until the cheese melts and turns golden brown. Remove from oven, and let cool for 5 minutes before serving.

Step 8

Garnish with extra parsley and Parmesan cheese on top.