1poundboneless,skinless chicken breasts, cut into 6 thin pieces that are approximately 2-3 ounces each
Cooking spray
Additional salt and pepper,to taste
6slicesFrench bread
3/4cupshredded Gruyere cheese
Instructions
In a large skillet set over medium heat, warm oil. Add onions, salt, and pepper. Cook, covered, 13-15 minutes, or until the onions are tender, stirring occasionally.
Uncover skillet. Mix in brown sugar, cooking wine, Worcestershire sauce, and vinegar with the onions and allow to cook an additional 3-5 minutes over medium-high heat, or until the onions are golden brown and caramelized. Transfer onions to a plate.
Add chicken to the skillet used to cook the onions. Spray with cooking spray and sprinkle with salt and pepper, to taste. Cook chicken 5-7 minutes on both sides, or until fully cooked.
Place 6 slices of French bread on a baking sheet. Top each bread slice with one piece of chicken, approximately 1/4 cup onions, and 2 tablespoons cheese.
Bake in oven set to 350°F for 3-5 minutes, or until cheese is melted.