Tortillas - bought on special. Cheese - literally any cheese: sliced, shredded, etc. Combine and microwave until cheese melted.

Boxed mac and cheese mixed with cut up hot dogs, brats, sausages.

Lunch idea: tuna, mayo, diced celery, bread of your choice - or serve open-faced with cheese on top; warmed/melted in the oven.

Ramen noodles with leftover chicken and broccoli mixed in.