If using 16 oz. shrimp, follow same instructions as 8 oz. shrimp, patting dry and seasoning with 1/4 tsp. salt and a pinch of pepper. Cook in batches, if necessary.
If using scallops, follow same instructions as shrimp in Steps 2 and 3, cooking until scallops reach minimum internal temperature, 1-2 minutes per side.
If using diced chicken breast, follow same instructions as shrimp in Steps 2 and 3, stirring occasionally until chicken reaches minimum internal temperature, 5-7 minutes.
If using bacon, line a plate with a paper towel. Place a medium non-stick pan over medium heat and adding bacon to hot pan. Flip occasionally until crisp, 6-8 minutes. Transfer to towel-lined plate to remove excess oil. Crumble, and place on pasta.