Lamb Timpano

Ingredients

• ["Lamb and Vegetable/Cheese Mixture", "1 pound ground lamb", "1/2 smallish onion, finely chopped", "3 garlic cloves, finely chopped", "1 teaspoon salt", "1/2 teaspoon ground cumin", "1/4 teaspoon ground coriander", "1/2 teaspoon black pepper", "juice of half a lemon", "1 tablespoon olive oil", "1 red pepper, seeded and diced", "1 zucchini, diced (I don't bother peeling it)", "1/4-1/2 teaspoons salt", "pepper to taste", "1 (15) ounce can chickpeas, drained and rinsed", "1/2 cup Kalamata olives, pitted and chopped", "handful of parsley, chopped", "zest of a lemon", "1 whole wheat or white pita, lightly toasted and chopped", "1 1/2 cups full fat yogurt", "4 ounces feta cheese, crumbled or chopped", "Eggplant and Assembly/Baking of Timpano", "2 pounds eggplant, cut into 1/2\" pieces lengthwise (I don't bother peeling)""