In a large bowl, mix together the cooked pasta, ground chuck, ground sirloin, hot sauce, salt, pepper, mustard and the chopped cheese. Score the meat into 4 equal portions and form patties.
Preheat a large, nonstick skillet with some EVOO. Add the patties to the skillet and cook about 3-4 minutes per side. A minute before you take the burgers off, place 1 slice of cheese on top of each burger. Tent the skillet with a piece of tin foil to melt the cheese.
While the burgers are cooking, mix the ketchup, relish, and sour cream in a small bowl.
To assemble the burgers, place a patty on each of the rolls, top with some chopped onion, shredded lettuce and special sauce.