1 cup all-purpose flour
2 tablespoons cornstarch
1 teaspoon baking powder
0.5 teaspoon salt
1 cup beer
1 egg
0.5 cup plain yogurt
0.5 cup mayonnaise
1 lime, juiced
1 jalapeno pepper, minced
1 teaspoon minced capers
1 teaspoon ground cayenne pepper
0.5 teaspoon dried oregano
0.5 teaspoon ground cumin
0.5 teaspoon dried dill weed
1 quart oil for frying
1 pound cod fillets, cut into 2 to 3 ounce portions
2 tablespoons all-purpose flour, or more as needed
1 (12 ounce) package corn tortillas
0.5 medium head cabbage, finely shredded