Preheat oven to 375°F.
Combine ingredients for the Blue Ranch dressing in a food processor, process until smooth and taste to adjust seasoning and hot sauce. Reserve.
Place bacon on a slotted pan or wire rack inserted onto a rimmed baking sheet and bake to crisp and well-browned, 18 minutes.
Combine the red onions and lime juice with salt and pepper to quick-pickle the onions.
Combine turkey with salt, pepper, grated onion, garlic, Worcestershire and mustard. Form 6 patties that are thinner at the center and thicker at the edges for even cooking.
Heat a cast-iron griddle or skillet over medium-high heat.
Drizzle burgers with oil and cook patties 7-8 minutes, turning occasionally.
Lightly toast the buns and stack: bun, pickled onions, pickles, burger patty, bacon, lettuce, a tomato slice seasoned with celery salt and the bun tops.