Sweet Vermicelli (Meethi Seviyan) is a popular dessert in South Asian cuisine, especially during Ramadan and Eid Al Fitr.
Japchae (also spelled "chapchae") is a Korean dish that is based on slippery, resilient sweet potato noodles (sometimes mung bean noodles are used, but they have a more tender texture).
Sweet potato vermicelli noodles can be tricky to get hold of, but they keep for ages and really are the key to a great japchae. Mix up the veg if you wish to make use of what you have in the fridge.