This one is super easy (like 20 minutes) and was really good. Essie devoured it!
1 lb ground beef
1 cup salsa
1 cup cheddar cheese
Prepare Mac'n'Cheese according to directions.
Brown beef in skillet on medium heat until no longer pink. Add salsa and cook an additional 5 minutes.
Add meat mixture to mac'n'cheese...stir to combine and top with cheese!