Gorgonzola Beef Wellingtons

Sprinkle steaks with 1/2 teaspoon each salt and pepper. In a large skillet, brown steaks in 2 tablespoons butter in batches. Remove from the skillet; cool slightly and refrigerate until chilled.
In the same skillet, saute mushrooms and shallots in remaining butter until tender. Add the garlic and remaining salt and pepper; cook 1 minute longer.
On a lightly floured surface, roll each puff pastry sheet into a 14-in square. Cut into four 6-1/2-in. squares (use scraps to make decorative cutouts if desired).
Place 2 tablespoons cheese in the center of each square; top with 3 tablespoons mushroom mixture and a steak. Lightly brush pastry edges with egg. Bring opposite corners of pastry over steak; pinch seams to seal tightly.
Place seam side down in a greased 15x10x1-in. baking pan. Cut four small slits in top of pastry. Arrange cutouts over tops if desired. Brush with egg. Bake at 425u0b0 for 25-30 minutes or until pastry is golden brown and meat reaches desired doneness (for medium-rare, a thermometer should read 135u0b0; medium, 140u0b0; medium-well 145u0b0).
Meanwhile, in a large saucepan, combine broth and wine. Bring to a boil; cook until liquid is reduced by half, about 30 minutes. Stir in tomato paste and thyme. Serve with beef Wellingtons.