In a large bowl, combine the eggs, ¾ c. pizza sauce, bread crumbs, onion, oregano, garlic, salt and pepper. Crumble beef and sausage over mixture and mix well.
On a piece of parchment or wax paper, pat half the beef mixture into a 12in x 10in rectangle. Layer the ham, ¾c. cheese and mushrooms over the beef mixture to within 1 inches of the edges. Roll up jelly-roll style, starting with the short side and peeling wax paper away as you roll.
Seal seam and edges.
Repeat steps 2-3 with the other half of the beef mixture.
Place seam side down in a greased baking dish, brush with pizza sauce.
Bake, uncovered, at 375 for 1 hour. Sprinkle with chess and back 10 minutes longer or until no pink remains (a meat thermometer should read 160 degrees).