1. Preheat a clean barbecue grill on high. 2. Toast both halves of the bun, face down, in a skillet over medium heat. Set aside. 3. Cut each of the 2 onion rings into quarters. 4. Mix the catsup and relish together. This is your "secret sauce". 5. Form the bround beef into a thin patty slightly larger than the bun. 6. Grill the meat for 2 or 3 minutes per side. Salt lightly. 7. Build the burger in the following stacking order from the bottom up: bottom bun half of the mayonnaise pickles lettuce tomato slices onion beef patty remainder of amyonnaise special sauce (catsup and relish) top bun Makes 1 hamburger.