Take 2-3 cups of water in a vessel, add salt and two tsp of oil to it and let it boil.
Add the roasted vermicelli to it and allow it to semi cook / half cook.
Drain using a strainer and run cold water immediately over this(to avoid sticking of the vermicelli). Keep it aside.
Heat ghee in a kadai or a nonstick pan.
Add mustard seeds and when it splutters, add chopped onions, ginger, green chillies and saute well on medium or low flame.
Add salt, turmeric and the chopped tomatoes and saute for 2 minutes.
Add the cooked vegetables and stir well for another 2 minutes.
Finally, add the vermicelli, which would be dry now after all the water has drained. Mix well stirring carefully.
Garnish with cashews and finely chopped coriander leaves.
:- Serve hot.