Pane Carasau and Lamb Deep Dish Lasagna

Name: Pane Carasau and Lamb Deep Dish Lasagna
Ingredients: For the lamb ragu:; 1 pound ground lamb; 1 1/2 cups yellow onion, small dice; 1/4 cup fresh garlic, peeled and sliced thinly; 3/4 teaspoon cinnamon, ground; 1/4 teaspoon all spice, ground; 1 teaspoon aleppo pepper; 1 to 2 bay leaves; 1 teaspoon za'atar; pinch of saffron, crumbled; 1/2 cup dry white wine; 1/4 cup extra virgin olive oil; 28 ounces Pomi brand strained tomatoes; 8 ounces fresh mozzarella, sliced; 1 cup Asiago cheese grated; 2 to 3 sheets of Pane Carasau; For the yogurt topping:; 1/2 cup heavy cream; 1/3 cup whole milk yogurt; Pinch fresh ground nutmeg; 2 egg yolks; Pinch kosher salt and fresh ground white pepper