Preheat grill to high + oil grates; cut off the stem of 1 onion; discard outer skin; then carefully slice onion into ¼ to ½-inch rounds; drizzle with oil + salt/pep; grill 5 min with lid closed; flip + grill 4-6 min until charred + slightly softened

Meanwhile; rub burgers with 1 tbsp oil + salt/pep; grill 3 min per side with lid closed

Heat skillet over medium; add ½ pack bacon + cook; flipping frequently; until browned + cooked through; 4-6 min

Grill 2 buns until warm + golden; spread 2 tbsp sauce onto each bun; top buns with burgers; onions + bacon; close the lid; that looks so good!