Lamb Lasagna with Parmesan Polenta

Name: Lamb Lasagna with Parmesan Polenta
Ingredients: For The Parmesan Polenta:; 1 cup Polenta; 6 cups chicken stock or chicken broth; 2/3 cup grated Parmesan cheese; salt to taste; For The Lasagne:; 2 tablespoons olive oil; 1 large onion, chopped; 4 large garlic cloves, minced; 1 1/2 teaspoons salt and pepper; 2 pounds ground lamb; 2 14.5-ounce cans petite diced tomatoes; 2 tablespoons Parmesan cheese; 4 tablespoons finely chopped parsley (more for garnish); 2 1/2 teaspoons allspice; 1/4 teaspoon cayenne; 3 cups shredded mozzarella cheese