Neely's Fish and Chips

INGREDIENTS

• 1 clove garlic, minced
• 1 cup mayonnaise
• 8 (4-ounce) cod fillets
• Kosher salt
• 1 teaspoon garlic powder
• 1/3 cup cornstarch
• Gina's Spicy Tatar Sauce, recipe follows
• 3 large russet potatoes, unpeeled and scrubbed, cut into 1/4-inch French fries
• Dash hot sauce
• Freshly ground black pepper
• 2 cups all-purpose flour, divided
• 3 tablespoons hot pepper relish
• 1 cup beer
• Peanut oil, for frying
• 1 teaspoon baking powder
• 1/4 teaspoon cayenne pepper
• 1 teaspoon smoked paprika
• Salt and freshly ground black pepper