Seven-star Purple Crabs click to see closer Materials: 7 live female crabs 7 egg whites 250g soup stock Preparations: Clean and steam the crabs. Mix the egg whites with salt, MSG and clear soup, put half of the mixture into a soup plate and steam over a high heat for five minutes, put the steamed crabs onto the steamed egg whites, sprinkle the other half of the mixture over the crabs and steam for three minutes. Pick out the crabs, take out the meat and ovary then place the meat on the egg white to restore the crab shape. Steam again over a high heat for five minutes.