In a medium bowl, whisk the egg white with the cornstarch, sugar, salt and pepper until a paste forms. Add the shrimp and toss to coat. Set the shrimp aside to marinate for 10 minutes. In a small bowl, combine the garlic, ginger and red pepper flakes; set aside.
Heat a large, heavy skillet over high heat for 3 minutes. Add the oil and swirl to coat the bottom of the skillet. Add the shrimp and the white and light green scallion pieces and stir to coat with the oil. Cook, stirring and scraping up any brown bits from the bottom of the skillet, until the shrimp are almost cooked through, about 2 minutes. Add the garlic mixture and the dark green scallion pieces and cook, stirring, until the shrimp are cooked through, about 1 minute more. Season to taste with salt and pepper. Transfer the shrimp to a large platter and serve with steamed rice.
The recipe was good but it came out salty. I would use only one teaspoon of salt. Also there is a mistake on the amount of ginger.