Cook the tortellini according to package instructions, then drain and set aside.

Heat olive oil in a large pan over medium-high heat, then sauté the onions until soft.

Add garlic to the pan and cook for 1 minute until fragrant.

Season the steak with salt and pepper, then sear in the pan until cooked to your liking.

Remove the steak from the pan, rest for a few minutes, and then slice it thinly.

Pour in the beef broth and heavy cream, stirring to combine.

Add the cheeses and stir until the sauce is creamy and smooth.

Toss the cooked tortellini and sliced steak into the sauce, mixing to coat evenly.

Garnish with fresh parsley and serve immediately.