Answer:
I'm a green veggie that looks like a tiny tree.
How can a pants pocket be empty and still have something in it?
Ch side by side, you are inside.
I'm a small ring shaped fried cake, often with bavarian cream or fruit filling, and sometimes covered in icing and sprinkles.
This is the main ingredient in spaghetti and Mac-ยญN-ยญCheese.
Long and slinky like a trout, never sings till it's guts come out.