Created by Shadows1 on January 7, 2015
Step 1: Season pork with salt and pepper.
Step 2: Dredge in flour, shake off excess.
Step 3: Melt butter with 1 tablespoon oil in heavy large deep skillet over medium-high heat.
Step 4: Add pork in batches and brown well, about 6 minutes per side.
Step 5: Transfer pork to plate. Set aside.
Step 6: Dredge onions in flour; shake off excess.
Step 7: Heat remaining 1 tablespoon oil in same skillet over medium heat. Add onions and garlic. Season with salt. Cover and cook 5 minutes, stirring once.
Step 8: Uncover and cook 4 more minutes, stirring occasionally.
Step 9: Add 1/4 cup stout and 3/4 cup stock and bring to a boil, scraping up any browned bits.
Step 10: Return pork to skillet.
Step 11: Spoon some of onions over pork. Add enough additional stout and stock to bring liquid halfway up sides of pork.
Step 12: Cover skillet with foil, then lid. Reduce heat and simmer 20 minutes.
Step 13: Turn pork over and cook until very tender, about 25 more minutes.
Step 14: Transfer pork and onions to platter using slotted spoon. Deglace pan juices. Boil juices until thickened slightly, about 10 minutes.
Step 15: Whisk in 1 tablespoon mustard.
Step 16: Add chopped parsley and 1 1/2 teaspoons balsamic vinegar. Taste, adding more mustard or vinegar if desired.
Step 17: Serve gravy over pork.
Step 18: Garnish with parsley .