In 2-quart saucepan, heat sauce ingredients to boiling over medium heat, stirring frequently. Reduce heat to medium-low and simmer 20 minutes, stirring occasionally to prevent scorching.
In medium microwavable bowl, place chicken; cover. Microwave on High 4 to 5 minutes or until hot. Add sauce to chicken, stir to coat.
Place about 1/3 cup chicken mixture on bottom of each slider bun; top with bun top. Garnish each sandwich with green olive.