40

Ingredients:

4 chicken breast halves, bone in
1/4 cup balsamic vinegar
1 tablespoon olive oil
1 1/2 teaspoons dried oregano
1 teaspoon kosher salt
1/2 teaspoon fresh ground black pepper

Directions:

1  Preheat oven 400 degrees.
2  Arrange the chicken bone side down in a 9-by-13 inch glass or ceramic baking dish.
3  pour the vinegar over them and sprinkle evenly with the oil, oregano, salt and pepper.
4  Bake the chicken 20 minutes and baste with the vinegar juices.
5  Bake 20 minutes more (depending the size of breast) or until juices run clear.
6  Serve chicken with juices spooned over them.

source:     http://www.food.com/recipe/baked-balsamic-chicken-55673