In a large bowl, mix flour, chile powder and sesame seeds. Whisk in soda water until a pancake batter consistency is achieved. In one hand, grab one crab, 3 asparagus and 2 onions rings and completely coat in the batter. Lightly drop in 350 degree oil and fry for 4 to 5 minutes until golden brown. Season with salt and drain on paper towels. Repeat with remaining crabs, asparagus and onion.
YUZU-MAUI ONION SALAD:
In a food processor, puree everything together until smooth. Check for seasoning. Toss the salad lightly with the vinaigrette.
PLATING On a large plate, drizzle some remaining vinaigrette. Place a small mound of salad and top with the tempura crab sliced in half.
Wine Suggestion: Sancerre, Richard Bourgeois, 1997