Whisk together the egg white, cornstarch, sugar, salt & pepper until a paste forms. Add the shrimp and coat then set aside for 10 minutes to marinate.
In another bowl combine the garlic, ginger and red pepper flakes.
Heat a large skillet over high heat for 3 minutes, then coat the bottom with oil. Add the shrimp and the white & light green parts of the scallion and stir to coat with oil.
Cook, stirring, until the shrimp is almost cooked through. Add the garlic mixture and the dark green scallions and cook, stirring, until the shrimp are cooked through. Serve with rice.