Steak-ums!
Around $5 a box.
Basically just a flat square a beef. I tear it up into little chunks and make Philly Cheese steaks out of em.
Tear them apart, put em in the frying pan, and wait until its fully cooked. Then put the meat on a sub bun and add some cheese, then viola!
Takes at most 10 minutes to make, and they taste not half bad!