If using ground beef, follow same instructions as chicken in Step 2, adding a pinch of salt and pepper and stirring occasionally, breaking up meat, until no pink remains, 4-6 minutes. Follow same instructions as chicken in Steps 3 and 4.
If using shrimp, follow same instructions as chicken in Step 2. Add shrimp to hot pan and cook undisturbed until seared on one side, 2-3 minutes. Flip, and cook until shrimp reaches a minimum internal temperature of 145 degrees, 1-2 minutes. Follow same instruction as chicken in Step 3. In Step 4, follow same instructions and bake in hot oven, 4-6 minutes.