In the meantime, in a large bowl, mix the ground beef, egg, and 15 mL (1 tbsp) cornstarch thoroughly. Then, add the water that the green onion and ginger were soaked in and continue mixing the mixture until achieving a smooth and homogenous mixture. Add 15 mL (1 tbsp)of soy sauce and 1 mL (¼ tsp) of ground black pepper and mix thoroughly