Beer-Battered Fish Tacos

Start with the toppings. For pickled onion: Combine onion, vinegar, sugar, and 1/4 tsp. salt, stirring until sugar dissolves. Cover and let stand at room temperature 1 1/2 hours, stirring a few times. Drain before using. For slaw: Combine cabbage, lime juice, cilantro, mint and 1/4 teaspoon salt. For aioli: Stir together mayonnaise, 1 tsp. smoked paprika and lemon juice.

Generously season fish fillets on both sides with salt and black pepper. In a shallow bowl, whisk together 2 cups flour, 1/2 teaspoon smoked paprika, 1/4 teaspoon salt and baking soda. Slowly stir in beer and club soda.** Let batter rest 8 minutes.

Heat oil in a deep fryer or 6-quart pot to 360°. Put 1/2 cup flour on a plate. Dredge fish in flour. Shake off excess. Using tongs or long kitchen tweezers, dip fish in beer batter, then transfer immediately to the hot oil, swirling it gently halfway in about 3 seconds before letting go. Fry until golden brown, 4 to 5 minutes. Remove fish to a cooling rack. Serve in warm corn tortillas with prepared toppings.