There are varieties of dosa. It is very difficult to make the kids to eat vegetables. It is the best way to prepare. Here i have used only beetroot and carrot, but you can use other veggies like cabbage, aloo, onions etc.
Apply curry leaves shallot chutney and spread it. For curry leaves shallot chutney, refer this link:
https://www.pachakam.com/Recipes/Curry-Leaves-Shallots-Chutney
Sprinkle grated beetroot and carrot around dosa
Sprinkle few idli podi
Spread oil around it. Close it with a lid and cook. Crispy dosa is ready.