Whisk up a marinade by combining the juice of 1 lime (the one you halved), the olive oil, cumin, diced jalapeño, a dash of hot sauce, and 1TB of the chopped cilantro. Sometimes we throw a splash of tequila in there, too. Marinate the fish for about 20 min. in a shallow, non-metal dish. Grill fish on medium-high heat until cooked (about 3-5 min. each side). While cooking fish, heat tortillas on the grill. Take the fish off the grill, season it with salt and pepper, and chop it up into bite size pieces. Place fish on the warm tortillas and top with the cabbage, diced cilantro, salsa, and avocado. You can also top with mayonnaise or sour cream if desired. Serve with lime wedges and hot sauce. Wash it all down with a Pacifico beer.