M.-
When our son "tried" to start being a picky eater I was lucky and had an appointment with his pediatrician coming up and had some friends who had children that had recently gone through this. So we nipped this behavior rather quickly.
Here is some advice I gathered and tricks of my own that worked. Our doctor told us children are very intelligent and keen, they know you will cave in to their pickiness if it has worked even a few times on prior occasions.
Offer a few select things at each meal or snack time even if they are not her favorites. No substitutes and no caving in. The first few times she may eat very little or nothing. That is what our son did. But children will not starve themselves. By his afternoon snack our son was trying some new foods and started eating what we put in front of him. But we stopped caving into his "hunger strikes".
We also started diluting his fruit juice with half water so the sugar wasn't so hard on his teeth and trying different fresh and canned fruits. We were surprised by what our son liked. He loves fresh raspberries, fresh strawberries, blackberries, papaya, and mango. He also loves canned mandarin oranges, canned peaches, and the flavored applesauces that have strawberry and mango mixed into them.
Our friends and pediatrician warned us that sticking it out would be hard, and it was hard to see our son go away from some meals without eating or eating very little, but we stuck to our guns and now he eats a much wider variety of foods. We also started using our food processor a lot and shredding carrots, cauliflower, and broccoli, into foods he would eat like spaghetti sauce, grilled cheese sandwhiches and such. He also likes home made banana bread, and we mixed fruit into his oatmeal and pancakes and he ate it without even knowing it was there.
All children go through set backs where they go on little hunger strikes. So don't get discouraged if this happens.
Also Gerber makes a great pack of veggie juices, that have carrot juice and such in them mixed with fruit juice. They are really for younger children but she may like them, be careful the carrot juice stains things easily. Gerber also makes a fruit drink line I think its called Splashers that contain less sugar than some other juices.
Good Luck, hope this helps a little.