Cut the hot dogs horizontally almost all the way through, but not quite.
Slice or tear each piece of cheese into 4 strips for each slice and put them in the center of the hotdogs.
Add mustard to the center of the hotdogs.
Flatten out a biscuits and wrap it around the hotdog.
Pinch the edges of the biscuit "blanket" shut and bake according to the directions on the biscuit package.