If using flank steak, follow same instructions as steak strips, cooking until flank steak reaches a minimum internal temperature of 145 degrees.
If using 20 oz. steak strips, follow same instructions, seasoning with a pinch of salt and pepper and working in batches if necessary, cooking until steak strips reach a minimum internal temperature of 145 degrees.
If using shrimp, follow same instructions as steak strips in Step 3, cooking undisturbed until seared on one side, 2-3 minutes. Flip, and cook until shrimp reaches minimum internal temperature, 1-2 minutes. Omit demi-glace.