Refusing to eat

I'm at my wits end at the moment with DD refusing to eat.   She won't eat breakfast and has maybe 1/2 a sandwich for lunch and a bite of dinner. She's a very active busy girl and needs to be eating more. I am well aware you can't force toddlers to eat
She's always been a fussy eater but now I know she's hungry cause she is tired grumpy and throws tantrums at the drop of a hat.
I've also tried giving her more choices in other areas,like picking her own outfits,activities,food but none of it seems to be working.
I don't want her to be eating loads but somekind of breakfast would be a vast improvement.

HELP PLEASE

This is one battle that you will never win. Sorry to say this but it's one of the few things that toddlers can control.

Firstly take her to your GP to have her checked over. The doctor can prescribe a multi vitamin/mineral supplement and also rule out any physical reason for her not eating. If there is nothing physically wrong with her then just keep offering food and try not to get upset if she refuses. No child in NZ will starve themselves. She may also be getting enough food from milk so have a look at reducing this.

The best thing to do is try to relax (oh so hard I know because I have been there). The more she sees that it's not an issue for you the less importance she will place on controlling the food.

All the best