Ingredients:

• For the fish:
• 1 pound cod, tilapia, halibut, or other white fish filets
• 2 to 3 teaspoons chili powder, enough to coat the fish
• 1 teaspoon kosher salt
• For the fish taco sauce:
• 1/2 cup sour cream
• 1/4 cup mayonnaise
• 3 to 4 tablespoons lime juice (from 2 limes)
• 1 teaspoon hot sauce, optional
• To assemble:
• 1/2 small head red cabbage, shredded (about 4 cups)
• 12 taco-sized corn or flour tortillas
• 1 avocado, sliced
• 4 radishes, thinly sliced
• 4 spring onions, thinly sliced
• 1/3 cup roughly chopped cilantro