In a large skillet, heat the olive oil over medium-high heat. Add the sliced beefsteak and cook until browned, about 4-5 minutes. Remove the meat from the skillet and set aside.
In the same skillet, add sliced onions and bell pepper. Sauté them for about 3-4 minutes until they begin to soften. Add minced garlic and cook for another 1 minute.
While the vegetables are cooking, bring a large pot of salted water to a boil. Cook the cheese-filled tortellini according to package instructions (usually about 3-4 minutes). Drain and set aside.
Return the cooked beef to the skillet with the vegetables. Add Worcestershire sauce, oregano, salt, and pepper. Stir everything together and let it heat for another 2-3 minutes.
Gently fold the cooked tortellini into the skillet, mixing everything well to combine.
Evenly sprinkle the shredded provolone cheese over the top. Cover the skillet with a lid and allow the cheese to melt, about 2-3 minutes.
Once the cheese has melted, remove from heat and sprinkle fresh parsley on top for garnish.
Notes
Feel free to use different types of cheese or add more vegetables.