These delicious chicken focaccia sandwiches make a great weeknight meal and take just minutes to prepare.
Cut each chicken breast half in half horizontally, and lightly coat chicken with cooking spray. Sprinkle Italian seasoning, garlic powder, black pepper, and 1/8 teaspoon salt over chicken. Heat oil in a large nonstick skillet over medium-high heat. Add chicken; cook 2 minutes on each side or until browned. Reduce heat to medium; add water. Cook 10 minutes or until chicken is done. Remove chicken from pan; keep warm.
Return pan to medium-high heat. Add red onion; sauté 2 minutes. Add bell pepper, green onions, and remaining 1/8 teaspoon salt; sauté 2 minutes or until tender.
Place bottom half of focaccia on a baking sheet; top with chicken. Arrange onion mixture evenly over chicken; sprinkle with cheese. Broil 2 minutes or until cheese melts. Top with remaining bread; slice into 4 equal portions.