slightly salty-sweet.

Pour the honey mustard mixture evenly over the pork roast, turning the roast once or twice with tongs to coat all sides. Position the roast fat side up if there is a fat cap, so it bastes the meat as it cooks.
Cover the slow cooker with the lid and cook on LOW for 7 to 9 hours, or on HIGH for 3 1/2 to 4 1/2 hours, until the pork is very tender and easily shreds