Preheat oven to 350°; spray 11 x 7-inch baking dish with cooking spray.
In large skillet, cook bacon over medium-high heat 5 minutes or until crisp, stirring occasionally; transfer to paper towel-lined plate.
In large bowl, stir cream cheese, onions, chicken, Cheddar cheese, seasoning and bacon. Makes about 2 cups.
Place bottom rolls, cut side up, in prepared dish; top with cheese mixture and top rolls, cut side down. Brush tops of rolls with butter; cover dish with aluminum foil.
Bake sliders 15 minutes or until heated through and cheese melts; remove foil and bake 5 minutes or until tops are lightly browned.
Serve sliders sprinkled with chives, if desired. Makes 12 sliders.