Lemon Chicken Pot Pie

1 c. chicken broth
2-3 T. lemon juice
3 T. Dijon mustard
3 garlic cloves, minced
2 T. butter, melted
1/4 tsp. rosemary
3 T. arrowroot
3 chicken breasts, cooked and diced
1 lb. bag of frozen mixed vegetables

Combine first six ingredients in a large sauce pan and cook over medium heat. Add arrowroot to thicken. Stir in cooked chicken and frozen vegetables. Continue to cook until vegetables are tender. Serve over rice, mashed potatoes, or biscuits.