Spread top of eye of round with butter. Prick with a fork at 1/2 inch intervals. Sprinkle with tenderizer. Roast in a hot 450 degree oven for 60 min. (medium rare) then cool completely.

Meanwhile, combine chopped mushrooms, liver pate and rosemary. When meat is cooled, spread the mixture over entire surface. Roll out thawed patty shells about 1/4 inch , making one long piece of pastry. Wrap it around the beef. Tim edges, moisten and seal by pressing together. Brush crust with egg beaten with milk. Prick crust in a few places to allow steam to escape. Roll out trimmed edges and cut in narrow strips. Lay diagonally across wrapped beef in lattice pattern. Brush these with egg-milk.

Bake in hot 425 degree oven for 20 minutes or until pastry is golden brown. Serves 8-10.