FISH TACOS: Heat peanut oil to 350F in a large dutch oven or deep fryer. In a 9" x13" glass dish, combine club soda and tempura batter mix. Season fish with salt and pepper. Coat pieces of fish in batter and carefully drop them into the hot oil to cook.
Fry for about 3 minutes until golden brown. Drain on paper towels. Warm tortillas in the microwave or in a dry skillet over medium heat. Pile some fried fish on each corn tortilla and top with chipotle cream, red onion, cabbage and cilantro sprigs. Squeeze on some fresh lime juice and enjoy.
CHIPOTLE CREAM: Combine ingredients in a small mixing bowl with a spoon or rubber spatula until combined, adding more or less chipotle according to your taste.