Heat oven to 450°F.

Cut 4 (12x12 inch) sheets of heavy-duty foil.

Place 1 chicken breast in center of each.

Top each with 1 tablespoon dressing, 1 slice tomato and 3 sage leaves.

Bring up 2 sides of foil so edges meet.

Seal edges, making tight ½-inch fold; fold again, allowing space for heat circulation and expansion.

Place packets on ungreased cookie sheet.

Bake 20 to 25 minutes or until juice of chicken is no longer pink when center of thickest pieces are cut and thermometer inserted in center reads at least 165°F.

To serve, cut large X across top of each packet; carefully fold back foil.