In a large skillet, cook beef and lamb over medium heat until no longer pink; drain. Stir in onion, garlic, oregano, basil, salt, pepper and thyme; mix well. Add the tomato sauce, tomatoes, and lemon juice.
Bring to a boil. Reduce; simmer, uncovered, for 20 minutes, stirring occasionally. Stir in the sugar and cinnamon. Simmer, uncovered, for 15 minutes longer.
Meanwhile, cook the pasta according to package directions; drain. Stir into meat mixture. Transfer to a greased 2 qt baking dish. Sprinkle with cheese.
Cover and bake at 325F for 45 minutes. Uncover; bake 15 minutes longer or until heated through.