I used red bean paste as the filling. Other common filling options include black sesame paste, peanut butter, lotus seed ...

You can use red onion or white onion either ... turmeric, tomato paste, vegetable broth, water, and mung beans and give them a good stir. Cover the pan and let this cook for about 40 minutes ...

Apart from the mung bean noodles ... white radish and pressed bean curd, but you can also add (or substitute) egg (make it into a thin omelette, then cut it into fine strands), red bell pepper ...