In a cup or bowl, combine the brown sugar, water, soy sauce, red pepper, and wine. Set aside.
Slice the beef into strips about 1/4-inch thick. Toss with the cornstarch and set aside.
In a large skillet or wok over medium heat, heat 1 tablespoon of oil. Add the garlic and ginger and cook, stirring, for about 1 minute. Add the sauce mixture and bring to a simmer. Simmer for 1 minute. Pour the sauce into a bowl and heat the remaining 1 tablespoon of oil in the skillet or wok. Add the beef and cook, stirring, until browned and cooked to desired doneness. Add the sauce back to the skillet and sprinkle with the green onions; heat through.
Serves 4 to 6.
Calories per serving (based on 4 servings): 491