Bleu Onion Burger on Mexican Bolillo
Prepare the patties by mixing the ground chuck, salt, pepper, and liquid smoke. Form 3 one-third pound patties. Place in fridge to set.
Fire up the grill to medium-high heat and grill the onion slices until nicely browned on both sides. Remove the burger patties from the fridge and grill to your desired level of doneness.
Brush each bolillo with a little bit of butter and grill for 10-15 seconds over high heat.
Stack your burger.