Step 1: Brown the Beef - Start by browning the ground beef in a skillet over medium heat. Break the meat apart as it cooks so it browns evenly. Once the beef is fully cooked, drain any excess grease. This step helps develop flavor and keeps the finished dish from becoming too greasy.
Step 2: Add Ingredients to the Slow Cooker - Transfer the browned ground beef to the slow cooker. Add the diced onion right on top. Next stir in the taco seasoning, drained diced tomatoes with green chilies, beef broth, and heavy cream. Give everything a good stir so the seasoning and liquids are evenly combined.
Step 3: Slow Cook the Mixture - Cover the slow cooker and cook the mixture on low for about 3 hours. During this time the onions soften, the flavors blend together, and the sauce develops a rich taco inspired taste.
Step 4: Add the Tortellini - After the initial cooking time, stir in the refrigerated cheese tortellini. Make sure the pasta is well coated in the sauce so it cooks evenly. Continue cooking on low for another 30 to 40 minutes until the tortellini is tender.
Step 5: Melt the Cheese - Once the tortellini is cooked through, stir in the shredded Mexican blend cheese. The heat from the slow cooker will melt the cheese into the sauce, making the dish creamy and rich.
Step 6: Garnish and Serve - Just before serving, sprinkle sliced scallions on top if you like. Serve warm in bowls and enjoy a comforting dinner that feels like taco night and pasta night all at once.