My three year old daughter just does not like vegetables. In the name of vegetables, all she eats are - potatoes (in any form), onion/ tomato/ garlic that I use to cool Lentils. And she is fond of mushrooms (but that's not a vegetable). I have tried various tricks like wrapping in the roti or making a sandwich or a homemade pizza... She'll just spit out the veggie piece.

Hiding it in food may not be a good option as they may feel that you are lying to them and will learn this. In this way, you may be teaching her the wrong thing again which is unhealthy. Share with her the goodness of eating vegetables slowly. She may not start eating yet but at least, she is aware of the goodness. Slowly after that, you can introduce vegetables to her one at a time.