Start by bringing a large pot of salted water to a boil. Add the cheese tortellini and cook according to the package directions, typically around 3-5 minutes until they float to the top. Once cooked, drain and set aside.
In a large skillet over medium heat, melt the butter. Once melted, add the minced garlic and sauté for about 30 seconds until fragrant. Be careful not to burn the garlic!
Sprinkle the flour over the melted butter and garlic, stirring constantly to create a roux. Cook for about 1-2 minutes until it turns a light golden color.
Gradually pour in the chicken broth and milk, whisking continuously to incorporate the roux without lumps. Continue to cook until the mixture thickens, approximately 3-5 minutes.
Once the sauce has thickened, reduce the heat to low and stir in the grated parmesan cheese. Mix until the cheese is melted and the sauce is creamy.
Add the cooked tortellini to the skillet, stirring gently to coat the pasta in the sauce. Season with salt and pepper to taste. If you like a bit of freshness, toss in some chopped parsley at this point.
Spoon the Cheesy Tortellini Pasta into bowls and garnish with additional parsley or parmesan if desired. Enjoy every creamy bite!