Bring a large pot of salted water to a boil. Add tortellini and cook according to package instructions, about 3-5 minutes, until al dente. Drain and reserve a cup of pasta water.

In a skillet, heat olive oil over medium heat. Add diced vegetables and sauté for 3-4 minutes until softened. Pour in cream, stirring until it thickens slightly, about 5 minutes. Stir in cheese until melted.

Add cooked tortellini to the skillet, folding gently into the sauce. Cook for 2-3 minutes over low heat, adding reserved pasta water if needed to adjust sauce consistency.

Stir in cooked protein like sausage or chicken and warm through for 3-5 minutes.

Serve from the skillet, garnished with fresh herbs and grated Parmesan cheese.