In same skillet, melt remaining 2 tablespoons Spread over medium-high heat and cook onion, stirring occasionally, until golden, about 3 minutes. Stir in garlic and cook 1 minute. Stir in lemon juice and cook 1 minute. Add reserved broth mixture and bring to a boil. Return chicken and any chicken juices to skillet and simmer uncovered until chicken is thoroughly cooked, about 5 minutes. Sprinkle with parsley.