Chicken Philly Sandwiches

Ingredients

• 1/2 pound boneless skinless chicken breasts, cut into strips
• 2 teaspoons olive oil
• 1/2 teaspoon salt
• 1/2 teaspoon freshly ground pepper
• 1 large onion, halved and sliced
• 1 medium sweet red pepper, julienned
• 1 medium sweet orange or yellow pepper, julienned
• 6 slices provolone cheese, cut into strips
• 4 whole wheat hoagie buns, split and warmed