In a dish whisk together first 6 ingredients. Set aside.
Heat 1 tsp oil in large skillet and fry ground meat until cooked. Transfer to a plate.
Add remaining oil to skillet and sauté garlic and ginger for about 30 seconds. Add mushrooms and bamboo shoots, stirring until softened. Pour in broth mixture, along with meat and green onions, and stir until sauce is thickened.
Cook noodles according to package, drain well and toss in skillet with sauce.