Proof, the comfort food restaurant at the Four Seasons Resort Scottsdale, is the Warren Buffett version of an American diner. A high-ceilinged, expansive room done up in polished wood, decorative tile, and bare-bulb lighting with doors tall enough for a professional basketball player to pass through with ease. The breakfast, lunch, and dinner restaurant offers elevated home-style American classics like fried green tomatoes, shrimp and oyster po'boys, and chicken and waffles with bacon and bourbon syrup.