To a small bowl add in the mayonnaise, ketchup, mustard, relish, stir well and refrigerate.
Heat a skillet or large griddle to medium heat.
Portion the ground beef out into 5-7 balls.
Sprinkle each ball with a dash of salt and pepper.
You don’t want to over crowd your pan for this next part.
Add 1-2 ground beef balls into your pan (depending on your pan size) place a tortilla on top of each ground beef ball. Press the tortilla down to flatten the ground beef out to the size of the tortilla.
Cook for about 4 minutes on each side or until golden brown and the ground beef is cooked through.
Top with a 1/2 slice of cheese, sauce, onion, and lettuce.