Preheat oven to 350°.
Cook hamburger and onion separately. Rinse green chile and lay flat to dry. Place 2 crescent rolls flat on cookie sheet. Place a green chile on it, layer hamburger, onion and cheese, top with another two crescent rolls and bake at 350 for 13 minutes or until crispy and golden.
When you remove it, top with sour cream, more cheese and black olives. you may serve with guacamole and salsa if you desire.