Preheat oven to 375 degrees Fahrenheit. Spray both sides of sliced bread lightly with cooking spray and arrange on baking sheet. Sprinkle 3/4 cup of cheese over top of sliced bread and bake for 10 minutes or until bread is golden and cheese is melted. Arrange on a serving plate and spoon salsa evenly over slices of cheese bread. Scatter remaining cheese, green onions and black olives over top and serve with sour cream.