Answer:
A fruit on a tree. A tree on a fruit.
I'm usually served alongside burgers. I'm crispy golden potato sticks
This food is a Thanksgiving tradition.
This for is a baked dish of fruit, or meat and vegetables, typically with a top and base of pastry.
The leaves are on the fruit, the fruit is on the leaves. What is it?
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around