Stuffed Burger Bundles

Prepare stuffing according to package directions. Meanwhile, in a large bowl, combine the milk, salt and thyme. Crumble beef over milk mixture and mix well. Shape mixture into eight thin patties. Divide stuffing between four patties; top with remaining patties and press edges firmly to seal.

Place in an ungreased 13-in. x 9-in. baking dish.

Bake, uncovered, at 350° for 35-40 minutes or until a meat thermometer reads 160° and juices run clear.

For sauce, in a large skillet, saute mushrooms in butter until tender. Stir in the remaining ingredients; heat through.

Serve with burgers.