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HEAT oven to 350°F.
TOSS spaghetti with half the Parmesan and egg; press onto bottom and up side of 9-inch pie plate to form crust.
MIX meat and tomato sauce; spoon into crust. Top with mozzarella and remaining Parmesan.
BAKE 30 min. or until heated through. Let stand 5 min. before cutting to serve.