01 -
Add ground beef and diced onions to a large oven-safe skillet over medium-high heat. Stir frequently, breaking up the beef as it cooks.
02 -
Once beef is fully browned, carefully drain off any excess fat from the skillet.
03 -
Add salt, black pepper, and minced garlic to the skillet. Stir thoroughly, cooking for an additional minute to develop flavor.
04 -
Add frozen cheese tortellini to the skillet, tossing everything together.
05 -
Stir in the condensed cheddar soup and undrained Rotel diced tomatoes with green chilies, ensuring all ingredients are evenly combined.
06 -
Pour in milk, yellow mustard, and ketchup. Mix well, then bring mixture to a gentle boil.
07 -
Cover the skillet with a lid, reduce heat to medium-low, and let the mixture simmer for 5 to 6 minutes, stirring once halfway through.
08 -
Remove the lid and give a final stir, then sprinkle shredded cheddar cheese evenly over the top. Transfer the skillet to the broiler until the cheese is melted and golden, or alternatively, cover on the stovetop to melt cheese.
09 -
Remove the skillet from the oven and allow it to rest for several minutes before serving.