Scrub potato and cut into 1/4-in. slices. Arrange slices in a single layer on a greased broiler pan; sprinkle with salt. Broil 4 in. from the heat until golden brown. Turn potatoes; broil until tender. Drizzle with taco sauce; sprinkle with green onions, chilies, cheese and olives. Broil until cheese is melted.
Microwave Method: Arrange potato slices in a single layer on a microwave-safe plate; sprinkle with salt. Drizzle with half of the taco sauce. Cover and cook on high for 3-1/2 minutes or until tender, rotating plate once. Drizzle with remaining taco sauce; sprinkle with green onions, chilies, cheese and olives. Cover and cook for 30 seconds or until cheese is melted.