HEAT oven to 375°F.
MIX stuffing mix with half each of the pasta sauce and oregano. Add meat; mix well. Press onto bottom of 8-inch square baking dish.
COMBINE zucchini, mushrooms and remaining pasta sauce and oregano; spoon over meat. Cover with foil.
BAKE 35 min.; top with cheese. Bake 10 min. or until meatloaf is done (160°F).
serving size = 1 piece (277 g)