This crunchy, savoury sandwich is layered with fried soft crab, homemade tarter sauce slaw and seasoned potato chips.
Tartar Sauce Slaw
Old Bay Potato Chips
Special equipment: a deep-frying thermometer
Whisk together the cornichons, mayonnaise, capers, mustard, sugar, lemon juice, onion and some salt and pepper in a large bowl. Add the cabbage and toss to coat. Cover and refrigerate for 30 minutes.
Meanwhile, preheat the oven to 300 degrees F. Spread the potato chips in an even layer on a baking sheet and bake, just to warm, 2 minutes. Put the Old Bay in a small mesh strainer and tap evenly over the chips; toss the chips lightly.
Set a rack in a baking sheet. Heat 3 to 4 inches of oil in a Dutch oven over medium heat until it registers 375 degrees F on a deep-frying thermometer. Whisk together 2 cups of the rice flour and 2 cups water until smooth, then season with salt and pepper and some hot sauce if using.
Put the remaining 1 cup rice flour in a shallow dish and season with some salt and pepper. Sprinkle the crabs with salt and pepper.
Dredge 2 crabs in flour and tap off the excess. Dip in the tempura batter, letting any excess run off. Fry until golden brown, crispy and just cooked through, turning occasionally, about 5 minutes. Drain on the rack. Repeat with the remaining 2 crabs.
Put some of the slaw on the bottom of each bun and top with a fried crab. Add a bit more slaw and a tomato slice and top with chips. Close sandwiches with the tops of the buns and serve immediately.