Fry burger in a large skillet, large enough to put all other ingredients in. Add onion when burger is cooked. Cook until tender. Cut Velveeta into small pieces, so it melts easier. Open and drain all cans, pour into burger and cheese. Heat until everything is hot. Pour into baking dish, normally a 9x11". Open and unroll crescent rolls. Lay flat crescents over the top of the burger mix, making sure to seal up as many holes as possible. Bake for 12-15 minutes, just watch for the crescent to be done.
Serve and enjoy!! My kids, husband, and even my in-laws love this!!! Very easy and inexpensive to cook, hearty too!!