Clean the crabs and cut them in half, discarding the spongy 'dead man's fingers.' Smash the claws with a cleaver to allow the seasonings to penetrate. Deep fry the crab until half-cooked, then drain and set aside.
Heat a wok and melt the butter. Add the shallots, garlic, salted soybeans, dried prawns, black pepper, curry leaves, and chilies. Sauté until fragrant, then add the crab and the remaining ingredients. Cook for 5-10 minutes, until the crab is done.
Notes
I used stone crab for this recipe because I just love the big, juicy, and succulent claws of stone crabs, and this back pepper crab recipe is perfect for those claws!