Bring half of the Blackstone to medium-low heat. Bring the other half to medium-high heat.
Season your fish on both sides, then place on the medium-high heat side of the grill. It should only take around 5 minutes to cook. Flip carefully half way through.
Warm the tortillas on the half that is set to medium-low heat. Flip after a minute or so then wrap in a kitchen towel to keep warm.
Make your taco by taking a warmed tortilla, place a chunk of cod onto it, and then a forkful of the pineapple jalapeño slaw. Sprinkle cilantro as a garnish if using.
Pineapple Jalapeño Slaw
Add the red wine vinegar, sugar, salt, pepper, garlic powder, and olive oil to a small bowl and give everything a good mix.
Roast the jalapeños for about 10 minutes or until soft, then finely chop and place in a large bowl.
Add slaw mix and pineapple to the bowl.
Add the dressing and mix until the slaw is nicely coated.
Place it in the fridge until you are ready to serve.