FAJITAS! cheap enough, filling, good tasting, and most importantly, easy to make.
do this:
buy the tortillas (pick a color u like), buy lettuce, onions, a green pepper (or whatever color u want), shredded cheese, salsa, sour cream, guacamole, and some steak (get the best kind u can afford) or chicken (dark meat is tastier).
make the steak or chicken like usual (season it!) and cut it into strips. cook the onions with the steak too, but be careful not to caramelize the onions. them put it all into the tortilla and ure done! u can heat up the tortilla shell if u want.
the trick is to pile lots of meat into one fajita so that it can barely be folded. eat 2 or 3 and ull be done for awhile.
ps. if its morning, u can go breakfast styles and add scrambled eggs into the mix.