If using flank steak, follow same instructions as steak strips.
If using 20 oz. steak strips, separate into a single layer and pat dry. Season with 1/4 tsp. salt and a pinch of pepper and follow same instructions as steak strips, cooking in batches if necessary.
If using bacon, line a plate with a paper towel. Place a medium non-stick pan over medium heat and add bacon to hot pan. Flip occasionally until crisp and bacon reaches a minimum internal temperature of 145 degrees, 6-8 minutes. Transfer to towel-lined plate. Top sandwich with bacon.