One year not interested on food

Hello,

My one year daughter is not interested in eating at all no matter how hard I change her meals or even offering her favorite food.

I introduced her to a variety of food since 6 months and she learnt to eat by her hand sometimes.

But although she is not a good eater she eat 3 spoon and then she refuse even if I don’t breastfeed her for longer stretches she still refuse to eat good.

My doctor said to not give her milk even if it’s a 24 hours so she learn that she needs to eat.

But I don’t feel comfortable doing that.

Please advise me.