Top the grown-ups' burgers with the caramelized onions
with barbecue sauce and be sure to have mayonnaise and
mustard on hand. Serve corn on the cob and the baked
potato wedges to the whole crowd.
Mix first 4 ingredients in large bowl until blended.
Mix in pepper. Shape half of meat mixture into eight
1/2-inch-thick patties. Shape remaining meat
mixture into four 1-inch-thick patties. (Can be made 8
hours ahead. Cover and chill.)
Prepare barbecue (medium-high heat). Grill patties to
desired doneness, topping with cheese for last minute
of cooking, about 4 minutes per side for medium-rare
1/2-inch-thick patties, and about 6 minutes per side
for medium-rare 1-inch-thick patties. Place burgers on
bottom halves of buns. Top with lettuce, tomatoes and
upper halves of buns.