Preheat oven to 425°
On a pizza pan or cookie sheet, place one tortilla. Sprinkle half the cheese and all of the onion, jalapeno, olives and spinach. Top with the second tortilla. Sprinkle with the remaining cheese. Bake 8-10 minutes until cheese is melted and browned.
Let cool 5 minutes. Cut into wedges and serve warm. Garnish with sour cream, minced onions, chopped cilantro, avocado slices or guacamole.