Drain the vegetables and pat with paper towels until very dry. Line a sheet tray with paper towels.

Combine the rice flour and club soda and mix well.

Heat 3 inches of oil to 350 degrees in a Dutch oven or heavy pot.

Working in batches, dip the vegetables into the batter and fry for 2-3 minutes or until golden brown. Do not over-crowd the pan when frying. Remove from oil, place on paper towels to drain, and sprinkle with a little salt. Serve with the dipping sauce.

Combine the tamari, mirin, water, and honey in a small saucepan. Heat over medium heat until the honey melts. Add the green onion, ginger, and red pepper flakes. Can be made a week in advance. Store covered in the refrigerator.