Prep: 6 minutes; Cook: 10 minutes
1. Prepare grill.
2. Sprinkle chicken evenly with salt and pepper. Place chicken on grill rack coated with cooking spray; grill 5 to 6 minutes on each side or until done, brushing occasionally with lime juice. Grill pineapple 2 to 3 minutes on each side or until browned.
3. Spread mayonnaise on bottom halves of buns, if desired. Top each with 1 chicken breast half, 1 pineapple slice, 1 basil leaf, and 1 bun top. Serve immediately.