Harvest Cranberry Apple Spinach Stuffing

This is my family's favorite holiday stuffing/dressing. Even people like my husband, who don't like dressing love it. I just take regular store-bought stuffing mix and add in tons of fall fruit and veggies. The dish ends up being more fruit and vegetables than bread: colorful, flavorful, and healthy! It's easy to throw together for holiday meals, or if you're just craving something festive (like I was today). 

1 cup dried cranberries, soaked in hot water for at least 5 min
1 T butter
1 large onion, diced
4 stalks celery, diced
2 apples, peeled, cored and diced
4 cloves garlic, minced
Tony Chachere's or other seasoning salt, to taste
black pepper, to taste
16 oz frozen spinach, defrosted in microwave (chard or kale would also be fab here)
3.5 cups chicken stock
1 bag Peppridge Farms herb seasoned stuffing mix

In a medium-large skillet, saute butter, onion, celery, apples, and garlic until softened. Add spinach until warmed through. Combine all ingredients (including the water that the cranberries soaked in) in a large bowl. Pour into a large casserole dish and bake at 400, covered for 15 min, then remove cover and bake 15 more.