Preheat Oven to 375°F

in a small bowl, combine mustard, mayonnaise, sour cream, and lemon juice; mix well.

brush 1/2 of the mustard sauce on chicken and place in a shallow baking pan coated with non-stick cooking spray

bake chicken for 25 to 30 minutes, or until chicken is no longer punk inside. spoon remaining mustard sauce over chicken