Finely chop the avocado, mango, red onion, and tomato and place into a large mixing bowl. I recommend removing the seeds from the tomato first for a less watery salsa.
Add chopped cilantro to the salsa, then squeeze the juice of 1 lime, about 2 tablespoons.
For best results, mix the salsa together right before enjoying.
Preparing Guacamole:
Cut open the avocados and scoop the flesh out into a large bowl. Add a few tablespoons of chopped red onion, tomato, and cilantro.
Add a squeeze of lime juice. This will help keep the avocado green!
Using a large fork, mash the avocado until it’s chunky, then season the guacamole with salt and pepper to taste. Set aside the guacamole until ready to use.
Frying the Battered Fish:
In a large bowl, combine together the flour, rice flour, cornstarch and all the spices, then whisk together. Add the beer slowly, mixing the batter into a smooth paste before adding the rest of the liquid.
Into a separate flat tray, add the remaining 1 cup flour, used for coating the fish.
Cut the cod (or other white fish) into thick strips, about ½-inch thick.
Pour approximately 4 to 5 cups of canola oil into a tall sauté pan or a pot. Heat the oil over medium heat until it reaches 325°F.
Make about 6 to 8 pieces of fried fish at a time. First coat each piece of cod in flour, then drop into the beer batter. Make sure the fish is well coated in batter, then drop into the hot oil.
Fry for 4 to 5 minutes, until the fish is a rich, golden-brown color. Remove the fried fish onto a wire rack to cool.
Making Fish Tacos:
I recommend warming your tortillas first. You can heat them on the stove top directly over a gas flame, or a hot frying pan.
Spread a bit of guacamole onto each warm tortilla, then add several pieces of fried fish. Top with a generous amount of mango salsa, then add crumbled queso cheese and fresh cilantro on top.
Squeeze a bit of fresh lime juice over the top and enjoy immediately!