In a heavy bottom pan/pot add oil.
1 tablespoon oil
Once hot add the mustard seeds and let it splutter.
1 teaspoon mustard seeds
Now add the curry leaves
8-10 curry leaves
Add the onion and green chilies.
2-3 green chilies finely chopped
Add the cashews if using and saute until the onions are translucent.
1 small onion chopped, 2 tablespoon cashews
Once the onions are cooked, add tomatoes and turmeric powder.
1 small tomato chopped, ½ teaspoon turmeric powder
Cook till the tomatoes are cooked.
Add chopped coriander.
½ Cup chopped coriander, 1-1.5 cup water
Add 1.5 cups water, and bring the mixture to a boil. (One can first add only 1 cup and later on add the remaining half cup of water.)
Once the mixture starts boiling add sevai/vermicelli.
1 Cup roasted Sevai/Vermicelli
Mix everything and cover and cook on slow to medium mixing in between.
If required add hot boiling water ¼ cup at a time.
Once the sevai is cooked add lime juice and mix everything.
1 tablespoon lemon/lime juice
Switch off, cover, and let it rest for 5-10 mins.
Serve