Garlic Bread Steak Sandwich

COOK onions in large nonstick skillet on medium heat 10 min. or until caramelized. Remove from skillet; cover to keep warm.

ADD meat to skillet in batches, cook 2 to 3 min. or until done, turning occasionally and adding chiles to skillet with the last batch of meat. Remove from skillet; cover to keep warm. Return onions and meat to skillet. Stir in cilantro.

MIX mayo and garlic powder; spread onto cut sides of bolillos. Cook in skillet 2 min. on each side or until golden brown on both sides. Fill with meat mixture and Singles.