Mix all mayonnaise ingredients with salt and set aside.
Combine all dressing ingredients in a bowl and season with salt and cayenne pepper.
Pulse bread and half the parsley in a food processor into coarse crumbs and set aside.
Blend egg yolk, lemon juice, seasonings, and oil in the processor to create a sauce.
Mix sauce with onion, peppers, crab, remaining parsley, and half the crumbs.
Shape mixture into 1cm thick cakes and coat with the remaining breadcrumbs.
Fry crab cakes in foaming butter for 4-5 minutes per side until golden.
Cook noodles according to packet, drain, and plunge into cold water.
Boil vegetables for 2-3 minutes, then refresh in cold water.
Toss noodles and vegetables with dressing and garnish with lime, peanuts, and coriander.