Lamb and Beef Pastitsio

Name: Lamb and Beef Pastitsio
Ingredients: 2 tablespoons olive oil; 1/2 pound ground beef; 1/2 ground lamb (or beef is you choose not to use lamb); 1 medium yellow onion (diced); 4-5 cloves garlic (minced); 1 cup white wine; 2 cups tomato puree; 2 tablespoons fresh oregano (chopped); 2 teaspoons ground cinnamon; 1 + 1/2 teaspoon ground allspice; 1 + 1/2 teaspoon ground nutmeg; 1 pound ziti (or penne); 4 eggs (yolks and whites separated); 1 + 1/2 cup butter; 1/2 cup all-purpose flour; 2 1/4 cups whole milk; salt; fresh ground black pepper