Fill the fryer basin with 5 quarts (4.7 L) oil. Preheat the Wolf fryer module to 350°F (175°C). Combine all dry ingredients. Add egg and club soda and beat until smooth. Add additional flour if desired for thicker batter. Using fork or slotted spoon, dip vegetables and fish into the batter. Carefully place pieces into preheated oil. Deep-fry 2–3 minutes or until golden brown. Remove from oil and drain on paper towels. Repeat as needed with remaining vegetables and fish.