One of your favorite kinds are peanut noodles. That is a very simple dish. Sauce is what makes the flavor special. It consists of peanut butter, soy sauce, vinegar, oil, ginger, garlic, and a little bit of sugar. Since all those ingredients can be easily obtained in a Western supermarket you can try making those noodles yourself. If you’re in China you can buy them nearly anywhere for the price as cheap as 3-4RMB.