Cheesy Delicata Squash and Kale Casserole

Name: Cheesy Delicata Squash and Kale Casserole
Ingredients: 1/2 cup apple cider vinegar; 1 cup golden raisins; 1 large delicata squash (about 2 1/2 pounds), cut into 1/4 half-moons; 5 sprigs thyme; 3 garlic cloves; 4 tablespoons extra-virgin olive oil, divided, plus more for pan; 1 3/4 teaspoons kosher salt, divided; 1 teaspoon freshly ground black pepper; 1/2 cup hazelnuts, coarsely chopped; 8 ounces ricotta; 3/4 cup heavy cream; 8 ounces low-moisture shredded mozzarella, divided; 1/2 cup panko (Japanese breadcrumbs); 1/2 bunch (about 6 ounces) Tuscan kale, stemmed, thinly sliced; A 2-quart baking dish