Answer:
Sometimes black, sometimes white, I have veins but no blood
A kind of weather that comes your way, but add a "D" and it will run away
What surrounds the world, yet dwells within a thimble?
What has three ways out and just one way in?
What is put on a table, cut, but never eaten?
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.