Roasted Mediterranean Vegetable Baked Ziti This vegetarian take on baked ziti is easy, tasty, and delicious. Serves 6-8 1 medium squash 8 oz. sliced mushrooms 1 medium zucchini 1 medium red onion 2 tbsp olive oil salt and pepper 1 lb. uncooked Barilla ziti 1 cup Galbani ricotta cheese 1 large egg 2 cups shredded Galbani mozzarella, divided salt and pepper 1 24 oz. jar Barilla marinara sauce