Balsamic-Glazed Chicken and Bell Pepper Sandwiches

Ingredients

• 4 teaspoons olive oil, divided
• 1/2 teaspoon salt, divided
• 1 1/4 pounds chicken breast tenders
• 1/2 cup balsamic vinegar, divided
• 2 cups red bell pepper strips (about 2 medium)
• 2 cups vertically sliced onion (about 1 large)
• 2 (8-ounce) loaves focaccia bread, cut in half horizontally
• 4 ounces provolone cheese, thinly sliced
• 1/8 teaspoon black pepper

Preparation

1. Heat 2 teaspoons oil in a large nonstick skillet over medium-high heat. Sprinkle 1/4 teaspoon salt over chicken. Add chicken to pan; cook 1 minute on each side or until lightly browned. Add 1/4 cup vinegar; cook 2 minutes or until chicken is done and vinegar is syrupy. Remove chicken mixture from the pan; cover and keep warm. Wipe pan clean with a paper towel.
2. Return pan to medium-high heat; add remaining 2 teaspoons oil. Add bell pepper and onion; sauté 7 minutes or until tender. Stir in remaining 1/4 teaspoon salt and remaining 1/4 cup vinegar; cook 1 minute or until vinegar is syrupy.
3. Arrange chicken mixture evenly over bottom halves of bread; top with bell pepper mixture. Arrange cheese over pepper mixture, and sprinkle with black pepper. Top with top halves of bread. Place a cast-iron or heavy skillet on top of sandwiches; let stand 5 minutes. Cut each sandwich into 6 wedges.