Brown the ground beef along with the ginger and garlic in a skillet over medium-high heat, until beef is crumbled and cooked through. Drain any fat and return pan to stove top.
Combine the soy sauce, brown sugar and hoisin sauce in a small dish and pour into ground beef mixture. Cook for about 2 to 3 minutes to blend flavors. Meanwhile in a small dish combine the 1/4 cup water along with the 2 tbsp cornstarch. Pour the mixture into the ground beef and stir until sauce thickens.
Season with red pepper flakes, black pepper and green onions. Serve hot over hot rice or noodles. Enjoy!