Cook the tortellini according to package instructions. Drain and set aside.
In a large skillet over medium-high heat, heat 1 tablespoon of olive oil. Add the beef slices, season with a pinch of salt and pepper, and cook until browned, about 3-4 minutes. Remove from the skillet and set aside.
In the same skillet, add the remaining olive oil. Sauté the bell peppers and onion until softened, about 5 minutes. Add garlic and cook for 1 more minute until fragrant.
Sprinkle the flour over the vegetables, stirring to coat evenly. Gradually whisk in the milk and cream, stirring constantly until the mixture thickens, about 2-3 minutes.
Lower the heat and add the shredded provolone cheese, stirring until melted and smooth. Season the sauce with salt, pepper, and paprika.
Add the cooked beef and tortellini to the skillet, tossing gently to coat everything in the rich provolone sauce.
Garnish with fresh parsley if desired and serve immediately.