Chicken with Tomatoes and Balsamic Vinegar

Ingredients

• chicken broth
  1/3 cup
• olive oil
  2 tablespoons
• basalmic vinegar
  3 tablespoons
• chopped onions
  1/2 cup
• fresh chopped or 1 teaspoon finely minced garlic rosemary

  or 1/2 1 can (1 pound 12 ounces) dried rosemary
  1 teaspoon
• crumbled plum tomatoes

  drained
  1 unit
• Chicken breasts
  3 whole
• salt
  1/4 teaspoon
• cut in half Freshly ground black pepper
  1 unit