The Vitals: recipe: Prime Rib Holiday Dinner difficulty: Easy. Seems intimidating but the technique is nearly fool proof with the right equipment. health rating: indulgent. It’s the Holidays after all. time: Prime Rib: 4 hours including cooking time and prep. the roast has to be seasoned the night before. Mashed Potatoes: 30 min. Creamed Spinach: 30 minutes Cooking turkey is a big fat pain. There I said it. And this is coming from a guy who literally did a Thanksgiving ...