PREHEAT a skillet over medium to medium-high heat. Add olive oil.
WHILE oil is heating, pat your cod pieces dry with a clean paper towel.
LAY cod pieces flat on a plate and sprinkle with taco seasoning. Flip to season the other side.
ADD cod to heated skillet. Let cook for 3 minutes without touching, then flip and cook for 2 minutes, or until the internal temperature is 145 degrees F.
REMOVE cod from skillet and place on a paper towel-lined plate.
TO SERVE: Add a portion of Rainbow Slaw to a lettuce cup and top with a piece of taco-spiced cod. Garnish with fresh-squeezed lime juice, chopped green onion, cilantro, and compatible sauces like salsa and guacamole if desired.