Preheat oven to 350°F. Par-bake bacon 10 minutes on a slotted pan or on cooling rack set over baking sheet to render some of the fat. Cool to handle.
Combine BBQ sauce ingredients in a small pot. Bring to a bubble and reduce heat to low, cook 15-20 minutes to thicken.
Place onion rings in a bowl and dress with salt, pepper and lime juice.
Combine meat with chipotle, Worcestershire, salt, pepper and a drizzle of oil. Form 6 patties.
Heat a double-burner griddle or flat side of a grill pan over medium to medium-high heat.