Down Home Grilled Hamburgers 1/2 c sour cream 3 green onions -- chopped, : with tops 3 TB bread crumbs 1/2 ts Worcestershire sauce 1/2 ts lemon pepper 1 lb lean ground beef 4 hamburger buns : shredded lettuce 1 tomato -- 4 slices/hamburger 1 yellow onion -- 4 : slices/hamburger 2 ts mustard 1 TB mayonnaise 1 TB catsup 1. Prepare white or yellow sweet onion by slicing in thick slices, place in plastic bag or glass jar with ice water, seal and refrigerate until ready to use. This makes the onion