In a large bowl, gently combine the ground chicken, egg, bread crumbs, ranch seasoning, minced garlic, diced onion, and shredded cheddar cheese until everything is well mixed without overworking the meat.
Line a baking sheet or cutting board with parchment paper and form the mixture into evenly sized burger patties, preparing all of them before cooking.
Heat a skillet over medium heat and add a splash of oil. Cook each patty for about 6 to 8 minutes per side, or until thoroughly cooked through.
Gather your buns, cooked bacon, fresh lettuce, sliced tomatoes, and ranch dressing for assembling the burgers.
Place each cooked patty onto a bun, then layer with bacon, lettuce, tomatoes, and a good drizzle of ranch dressing. Add any extra veggies you like.
Serve your assembled burgers straight away and enjoy their rich, savory flavor.