For a richer flavor, use bone-in, skin-on chicken thighs. You may need to increase the cooking time slightly. If you don't have white wine on hand, chicken broth works perfectly fine. Feel free to add other vegetables to the casserole, such as bell peppers, zucchini, or spinach. This dish can be made ahead of time. Assemble the casserole, cover it tightly, and refrigerate for up to 24 hours. Add an extra 15-20 minutes to the baking time if cooking from cold. Store leftovers in an airtight container in the refrigerator for up to 3 days.