I know some people have recipes that they make for their birds, but I line making bird bread from mixes. My birds like Avian Organics and Momma’s. Also, you can add your own veggies to them if you want.
I've found a banana bread made out of only pure ingredients.
I make if for them and me.
Whole Wheat flour
old fashioned oat meal
Applesauce - unsweetened
honey for sweetener
eggs and bananas.
baking soda and cinnamon.
No oils, sugars, salt, or processed foods.
It's tasty and wholesome. Mine love it when I add nuts or blueberries.
You could easily add veggies if it's just for the birds.