I need suggestions for my fussy hard headed 19 month daughter?

My 3 year old son is an angel with food and loves trying new food... but my 19 month old daughter on the other hand is fussy and picky and will only eat ham, cheese, yoghurt, bananas and apples... she won't budge with vegies and I don't know what to do anymore... i've tried mashing them with potato and covering them in cheese but she picks it up looks at it and turns up her nose... i've been giving her a child multi vitimin because I was worried she's not getting the right vitamins... how can I get her to stuff other than what I stated??... she won't even eat rice or pasta... any help would be great!!