In a large skillet over medium heat, brown the lean ground beef until fully cooked, breaking it apart as it cooks.
Add the diced green bell pepper and diced onion to the skillet. Season with a pinch of salt and pepper. Continue cooking until the vegetables are softened and the onions become translucent.
Stir in the minced garlic and cook for about one minute, just until fragrant.
Add the tomato paste and stir well to coat the beef and vegetables. Let it cook for about four to five minutes, stirring frequently, until the tomato paste darkens slightly and caramelizes. This step builds rich, concentrated flavor.
Pour in the tomato sauce and beef broth. Stir in the chili seasoning packet and mix until fully combined.
Bring the mixture to a gentle simmer.
Add the cheese tortellini directly into the skillet. Stir to make sure the pasta is mostly submerged in the sauce.
Cover and cook for about ten minutes, or according to your package directions, stirring occasionally so nothing sticks. If the mixture begins to look too thick or dry, add a small splash of water to loosen it.
Once the tortellini are tender, stir in the heavy whipping cream. This softens the bold chili flavors and creates a creamy texture.
Add the shredded cheddar cheese and stir until fully melted and incorporated.
Remove from heat and serve warm.