Pastitsio for a Party

Name: Pastitsio for a Party
Ingredients: 1 cup onion, finely chopped; 1 cup plus 3 tablespoons butter; 2 cloves garlic; 1½ pounds ground lean beef; 2 pounds ground lean lamb; Salt and freshly ground black pepper; 3 cups tomato sauce; 1 teaspoon oregano; ½ teaspoon cinnamon; ½ teaspoon dried basil; 1 bay leaf; ½ cup finely chopped parsley; 1 cup dry red wine; 7 cups light cream; 2 cups milk; 1½ cups flour; Good pinch of nutmeg; 10 egg yolks; 2 cups fresh ricotta cheese; 1½ pounds elbow macaroni or ziti; 1½ cups grated Romano cheese