In a large pot of boiling water, place the noodles and cook for 2 minutes. Remove from heat and let stand in water to finish cooking. Check often and when cooking is adequate, drain the noodles and set aside.
In a bowl, mix all the ingredients for the sauce together. Book.
In a wok not, heat the oil. Add onions, peppers and pineapple. Make Sauter pendant few minutes. Add water chestnuts pour warm.
Add sauce, stir until it thickens slightly. Add chopped green onion.