Crispy Battered Fish Tacos

Heat oil to 350°F in a deep pan.

Whisk flour, cornstarch, salt, and sparkling water until smooth.

Dip fish into batter and fry until golden and crisp.

Drain fish on paper towels and season lightly.

Warm tortillas in a dry skillet.

Assemble tacos with fish, onions, cilantro, and lime.