Yam bundles are bundles of noodles made from the konjac plant. The noodles are also known as shirataki noodles. They are low in calories and carbohydrates. If you can't find the bundled versions, use shirataki noodles.
The noodles can be found in Asian speciality shops or online.
Although some oyster sauces contain oysters many do not choosing to use mushrooms as the prime ingredient thus making them vegetarian and vegan friendly.