In a large pan bring water, crab and corn to a boil. Simmer 2-3 minutes. Add salt and pepper. Mix 2 teaspoons water and 2tsp cornstarch together. Stir until soup is thickened. Quickly stir in the egg and serve.
*Blanch frozen crab meat in boiling water for about 30 seconds. Remove from water with a slotted spoon. Set aside until ready to add to soup.