A standard of Tex-Mex cuisine, migas are a great way to use up old, stale corn tortillas. The ingredients are mostly up to you, but this is sort of the standard:
Old corn tortillas, cut into squares
Bell peppers, diced (this is optional, but I like it)
Jalapenos (if you don't like this too hot, use pickled jalapenos, they're not normally too hot)
Tomatoes or chunky salsa
Cheese (cheddar, pepper jack,whatever)
Saute tortillas in some oil until they get a bit more transparent (they're gonna get cooked a lot more, so don't overdo it too much), then add onions and cook until halfway to transparent, then add peppers. I like to add some of the cilantro here. When everything's pretty well cooked, add tomatoes or salsa, cook for a bit. Eggs should be beaten with s&p, cilantro and some milk if possible. Pour eggs over everything, stir, and towards then end add cheese. I like to brown the whole mass a bit.
Serve with lots of salsa on top. Traditionally you're given even more tortillas to eat this with, but I prefer a fork.