Chicken with Lobster Sauce (Gourmet Group recipe)

serves 6-8
4 chicken boned chicken breasts
1/4 cup butter
2 T sherry
1 12 ox box fresh mushrooms, sliced
2 T flour
1 1/2 cups chicken stock
1 T tomato paste
salt and pepper to taste
2 10 oz packages frozen lobster tails

Season chicken with S & P.  Heat butter in large skillet.  Add chicken and brown until golden.  Spoon sherry over chicken.  Remove chicken and place in a shallow baking dish.  Cover and bake at 300 for 1 hour.  Add mushrooms to skillet and saute until tender.  You may have to add a little more butter.  Blend in flour and chicken stock. Simmer, stirring until thickened.  Season with tomato paste, salt and pepper.  Simmer 15 minutes.  Meanwhile, prepare lobster tails buy removing shells and cutting into bite-sized pieces.  Add lobster meat to sauce ad simmer until just heated through.  Serve chicken on large platter topped with sauce, arranging lobster attractively on top.