In large bowl, combine ground beef, cheese, cooked bacon and ranch seasoning. Form into four patties.
Use oil to brush Indoor/Outdoor Grill surface and preheat grill to setting 4.
Place burgers on grill and cook approximately 4 minutes per side.
Just before removing burgers from grill place slice of cheese atop each patty to melt.
Put each patty on bottom hamburger bun and top with lettuce, tomato and ranch dressing. Top with other bun half and serve.