Heat the olive oil in a small pan on medium-high heat. Place the flounder filet down, and sprinkle the first amount of salt and pepper on the exposed side. After about 3 minutes, flip the fish over to cook on the other side. Cook to your preferred doneness, but a slight char on the fish is best for this recipe.
Step 2
When the flounder is done cooking, turn off the heat and set the fish aside on a clean surface to cool. Meanwhile, dice the onion, jalapeno, and cilantro, and combine these ingredients with the second amount of salt in a bowl.
Step 3
Chop the cooled flounder into very small pieces combine this with the ingredients in the bowl. Open and avocado, remove the pit, and cut ½-inch cubes from the fruit. Save the avocado skins, as this will be your serving vessel.
Step 4
Combine the avocado and lime juice together with the taco ingredients as well. Then, scoop the filling into the avocado skins for serving. You can lightly pack the ingredients in, as they will slightly overflow from the avocado skins. Enjoy cold or warm – your choice!