Combine the blackened seasonings together. whisk well. Take 1 teaspoon out and set aside to use in the crema.
Make the crema! Add all the ingredients to a small food processor or blender and blitz. Give it a taste and adjust if needed (add more honey or spices!) add 1 tsp of water to thin sauce if desired.
Cook the blackened fish. Heat oil in a skillet on medium/high heat. Pat the fish dry with a paper towel. Rub the fish on all sides with the blackened seasonings.
Gently place the fish in the skillet, cook on each side for about 3-4 minutes. It should have a nice blackening once you flip it.
Once the fish is finished and cooked through to your liking, set it aside to cool for 2 minutes. Flake it with a fork.
Assemble the tacos, place cabbage on the bottom, drizzle with crema, add fish, tomatoes, onions, avocado, extra cilantro and another heavy drizzle of zesty crema. Enjoy!