1. Preheat oven to 375F.
2. Wash potatoes and poke with holes all over. Place on baking sheet and roast 45 minutes, or until tender.
3. Heat oil in skillet over medium heat. Add spinach and saute until tender. Toss chicken with buffalo sauce and heat in microwave.
4. Slit potatoes and fluff inside with a fork. Top potato with shredded chicken, spinach, and cheese. If desired, place potato under broiler on high for 2-3 minutes to melt the cheese.