Heat the same oil again in the same pan. Add mustard seeds, 1 teaspoon urad dal,1 teaspoon chana dal and 1 tablespoon peanuts. Saute and fry for a minute.
Add 12 curry leaves, 1 teaspoon minced ginger and saute well.
Add thinly sliced onions and saute for another minute or till they a turn a bit soft. Do not let the onions brown for any upma recipe.
Now add slit green chilli and saute again.
Add finely chopped vegetables and saute. Cook in medium heat for 2 minutes.
Now add 2 cups water, salt to taste and 1/4 teaspoon oil. Mix well and let the salt dissolve.
Bring water to a rolling boil.
Lower the flame and add roasted semiya. It will not form lumps like rava, so you can add everything at once.
Mix very well.
The semiya will absorb water and get cooked. Maintain medium heat.
Cook keeping the pan open until all the water is absorbed.
Once all the water is absorbed and vermicelli looks soft, cover the pan and simmer. Cook covered for for 2-3 minutes.Remove from flame, add lemon juice and 1/4 teaspoon sugar. Mix gently to fluff up the semiya. Serve semiya upma hot.