Place each chicken piece, boned side up, between 2 pieces of clear plastic wrap. Working from the center to the edges, pound lightly with the flat side of a meat mallet to 1/4-inch thickness. Remove plastic wrap. Sprinkle chicken with black pepper. Layer cheese, roasted red sweet pepper halves, and sage in the center of each breast. Fold in edges; roll up into a spiral, pressing the edges to seal. Roll in flour.
In an 8-inch skillet heat the oil over medium heat. Cook chicken in hot oil about 5 minutes, turning to brown all sides. Remove from skillet.
In the same skillet bring wine or broth to boiling; reduce heat. Simmer, uncovered, about 2 minutes or until 1/4 cup liquid remains. Return chicken to skillet. Cover and simmer for 8 to 9 minutes or until chicken is tender and no longer pink. To serve, spoon juices over chicken.