Sweet Potato Casserole with Herbed Mushroom Stuffing

Name: Sweet Potato Casserole with Herbed Mushroom Stuffing
Cuisine: American
Ingredients: ½ cup cashews; 1½ cups plant-based milk; 1 cup nutritional yeast; ¼ cup oat flour; ¼ cup lemon juice; Sea salt; Ground black pepper; 4 medium sweet potatoes, cut into ½-inch-thick rounds (about 3 pounds); 1 medium red onion, cut into ¼-inch dice (2 cups); 1 pound mushrooms, cut into ¼-inch dice; 2 tablespoons minced fresh garlic (6 cloves); 1 tablespoon (2–3 sprigs) finely chopped fresh rosemary (or ½ tablespoon dried); 1 tablespoon (5–6 sprigs) finely chopped fresh thyme (or ½ tablespoon dried); 2 tablespoons red wine vinegar; 1 cup breadcrumbs; ½ cup fresh or dried cranberries; ¼ cup finely chopped fresh chives, divided; ½ teaspoon sea salt; ¼ teaspoon ground black pepper