Start with soaking sabudana in water at room temperature.
Add water just up to the level of sabudana pearls. Do not add too much water else sabudana will turn soggy.
(I am using mini sabudana pearls here; thus 30 -45 min of soaking is enough. If bigger pearls are used, then soak them for at least 4-5 hours.)
Meanwhile; dry roast peanuts over medium-high heat until dry and crispy. Roughly ground roasted peanuts.
Take boiled potatoes and roughly mash them.
Add soaked sabudana and peanuts to mashed potatoes along with finely chopped green chillies and cumin seeds.
Season with salt and combine everything well. Our dough mixture for sabudana vada's is ready.
Make small balls to fit into cavities of Appe pan using this dough mixture.
Take appe pan over a high heat. Once pan is hot, add little oil in each cavity.
Transfer dough balls into each cavity and fry them over medium-high heat.
Add some more oil over the top (if required).
Keep turning these balls until golden brown from all sides.
Once they are cooked remove from the pan and transfer over paper towel.
Sabudana Vada or Appe are ready to serve.