If using 16 oz. scallops, follow same instructions, cooking in batches if necessary until scallops reach a minimum internal temperature of 145 degrees.
If using shrimp, follow same instructions as scallops in Steps 1 and 4, cooking undisturbed until seared on one side, 2-3 minutes. Flip, and cook until shrimp reaches minimum internal temperature, 1-2 minutes.
If using salmon fillets, pat dry and season flesh side with 1/4 tsp. salt and 1/4 tsp. pepper. Follow same instructions as shrimp in Step 4, cooking skin side up first until salmon reaches minimum internal temperature, 4-6 minutes per side.