Raw materials: tomatoes, green beans, flour, and some corn flour. \x0d\ Method: Make your own noodles. It is better to make the noodles harder. After rolling them out, cut them into thin strips and not too long. Mix with cornmeal and set aside. \x0d\ Cut the tomatoes and green beans into a pot and fry until cooked, then add water (just enough to cover the vegetables) and add various seasonings. After the water boils, add noodles and steam for about 10 minutes. \x0d\ The moisture has basically turned into steam or been absorbed by the surface. After the noodles are basically steamed, stir them up. Let the water disperse a little more. \x0d\ The kind you mentioned sold on the street seems to be made the same way, but the dishes are replaced with soybean sprouts, vermicelli, and sometimes shredded pork.