Baked Chicken Breasts With Horseradish Cream Sauce(Serves 4)  
["2 Tbsp. butter", "2 Tbsp. flour", "1 c. milk", "3 Tbsp. prepared white horseradish, drained", "2 Tbsp. sour cream", "1 tsp. sugar", "1 tsp. Dijon mustard", "1 tsp. white wine vinegar", "4 chicken breast halves with bone"]
["Preheat oven to 350\u00b0.", "In a medium saucepan, melt butter over medium heat.", "Stir in flour and cook, stirring, until sauce is thick and smooth, about 3 minutes.", "Stir in horseradish, sour cream, sugar, mustard and vinegar.", "Season with salt and pepper to taste."]
["butter", "flour", "milk", "white horseradish", "sour cream", "sugar", "mustard", "white wine vinegar", "chicken"]