Answer:
It is in every mountain, it's not in any hill, it's not in all the world, and yet it's in the mill.
The more you have of me, the less you see. Who am I?
What travels around the world without leaving the corner?
You speak this when you are being sincere.
I am partially baked. I am not completely lit. I am a portion of the moon. I am lesser than full wit. I am a divider of the hour. I am not a total lie. I am a sibling through one parent.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.