Heat a large skillet over medium heat and add the butter. When melted, add the minced garlic and sauté for about 1 minute, stirring constantly until fragrant.
Add the tomato paste, tomato sauce, heavy cream, and Italian seasoning to the skillet. Whisk or stir until the sauce is smooth and combined.
Stir in the refrigerated cheese tortellini (no pre-boiling needed). Reduce heat to medium-low, cover the skillet, and cook for 5 minutes.
Check the tortellini; if still firm, continue cooking, covered, for a few more minutes until tender. If the sauce becomes too thick, add a splash of cream or a little broth to loosen it.
Season the dish with salt and pepper to taste. Serve immediately topped with plenty of freshly grated Parmesan cheese.