Combine the cheese, mayonnaise, three-quarters of the olives, chiles, garlic powder and hot sauce in a large bowl. Stir until evenly blended. Spread into a lightly greased 9-inch pie plate or small baking dish. (At this point, you can cover the dish with plastic wrap and refrigerate up to 4 hours. Bake as directed, increasing baking time). Bake at 350 degrees F for 20 minutes or until heated through. Sprinkle the tomatoes, remaining olives, and green onions evenly on top. Serve warm with chips, peppers, crackers, crusty bread, etc.