It might be very helpful not only to have a real sit down with your pediatrician but to get the name of a good nutritionist from him/her as well. A nutritionist can advise you not only of a variety of different milk substitutes for the growing stages of your child but also the different food groups that would be appropriate for her, and the various fruits and vegetables, etc. that would help her get the proper nutrition.
The nutritionist can help make a meal plan with you as well as advise you on recipes and where to find them.