First, take a bowl, now add 1 cup rice flour& 1 cup water.

Whisk it properly so that there will be no lumps.
Then keep the batter aside.

Now take all vegetables as per you choice. wash and clean it properly
Now diced the vegetable and add in a chopper
Now chopped the vegetables.

Add the vegetable mixture in the batter.

Now heat the pan and pour dosa batter on it.
When one side is crispy flip the dosa to cook on another side and cook it.