Entered for safe-keeping, adapted from Donna Davidson in November 2000 Southern Living, times are for 15 psi 6-qt. (or larger) stovetop pressure cooker. See notes at the end of directions for necessary changes to prepare in an electric pressure cooker, such as Instant Pot. 5/24/18: I loaded the recipe as I would prepare it in a 6-quart Instant Pot electric pressure cooker; it is available here: http://www.geniuskitchen.com/recipe/sl-roast-with-onion-mushroom-gravy-6-qt-instant-pot-535868