Kim,
Were it breastmilk, I would say she's getting everything she needs. However, just because it is formula and she's not, doesn't mean you HAVE to start forcing foods. Try Dr. Sear's books; she may have moved part of her attitude into toddlerhood already ; )
When she is interested, play it up. When she is not, give her her bottle.
Leave the tricks, games, etc. out of food altogether - you can do more 'damage' that way than by simply just feeding her at her own speed.
She will not starve herself.
You can, however, disguise things. : D Had I needed to, all I would need to do would be to put veggies mixed with pasta and my son would have inhaled them.
Good luck,
M.