PERFECT PASTITSIO

Ingredients
2-1/2 cups uncooked penne pasta
2 tablespoons butter, melted
1 cup grated Parmesan cheese
1-1/2 pounds ground sirloin
1 medium onion, chopped
2 garlic cloves, minced
1 can (15 ounces) tomato sauce
1/2 teaspoon salt
1/2 teaspoon ground cinnamon
1 cup shredded Parmesan cheese, divided
BECHAMEL SAUCE
1/2 cup butter, cubed
2/3 cup all-purpose flour
1/2 teaspoon salt
1/4 teaspoon pepper
4 cups 2% milk
2 eggs
Directions
Cook pasta according to package directions; drain. Toss with butter; add grated Parmesan cheese. Transfer to a greased 13x9-in. baking dish.
Preheat oven to 350°. In a large skillet, cook beef and onion over medium heat 8-10 minutes or until beef is no longer pink, breaking beef into crumbles; drain. Add garlic; cook 2 minutes longer. Stir in tomato sauce, salt and cinnamon; heat through. Spoon over pasta. Sprinkle with 1/2 cup shredded Parmesan cheese.
In a large saucepan, melt butter. Stir in flour, salt and pepper until smooth; gradually add milk. Bring to a boil; cook and stir 1-2 minutes or until thickened.
In a small bowl, whisk a small amount of hot mixture into eggs; return all to pan, whisking constantly. Bring to a gentle boil; cook and stir 2 minutes. Pour over beef mixture. Sprinkle with remaining cheese.