Club-Style Filling: Spread 1/2 cup honey mustard on cut sides of rolls. Layer with 4 ounces thinly sliced cooked roast beef or fully cooked ham. Top with chicken. Add 6 tablespoons sliced ripe or pimiento-stuffed olives, 2 medium tomatoes, sliced, and, if desired, spinach leaves.
Mediterranean Filling: Spread 1/2 cup hummus on cut sides of rolls. Layer with 1 small red onion, thinly sliced, 2 ounces feta cheese, crumbled (1/2 cup), 24 spinach leaves and the chicken.
Western Barbecue Filling: Spread 1/2 cup guacamole on cut sides of rolls. Layer with chicken. Drizzle with 1/4 cup barbecue sauce. Add 1 small green bell pepper, thinly sliced.