In a large bowl, combine quinoa, corn, 1 cup of tomatoes, black beans, diced onions, jalapeno, enchilada sauce, and 1 1/2 cups of cheese. Spoon into a 2-quart baking dish. Top with remaining cheese. Sprinkle with half of the cilantro, remaining tomatoes, and sliced olives. Bake for 40-50 minutes, or until the cheese on top is bubbly and melted.