I think they are a great way to sneak in food your birds will not normally eat. On top of a rice cake and held together pretty well with the cheese, they usually eat everything on it, down to the last crumb!
Rice Cake Pizzas-shredded carrot
-favorite seed/nut of your bird, I used pine nuts and sesame seeds
-shredded cheese, with no dyes, optional (I only give my birds cheese once in a blue moon, and on something like this, a very little goes a long way)
-toppings: cinnamon, herbs, spices, or vitamins your bird needs, I used spirulina on the one for my budgies
Spread the rice cakes with a very small amount of jam, and add the celery, carrots, and cheese. Heat in the oven or microwave until the cheese is melted, and finish by adding the nuts/seeds, and any other toppings your bird likes.