This mushroom cheung fun recipe is a vegan version of one of my favorite dim sum dishes. Stir fried mushrooms are seasoned with teriyaki sauce and wrapped inside a soft and silky rice noodle sheet.If possible, use a scale to measure the flours to get an accurate measurement. The starches, especially potato starch, cake easily, so it might be difficult to get a precise volume measurement. That said, I have provided volume measurements in Note 2, using the spoon-and-sweep method of measuring flour. I originally published this recipe in September 2019 and made a few modifications to the preparation method for the filling.