For the Guinness Gravy: 2 tablespoons butter 1/4 cup finely minced onion 2 teaspoons strong Dijon mustard (like Maille) 2 teaspoons cornstarch 1 cup chicken stock (can substitute vegetable broth) 1 cup Guinness Draught salt and pepper to taste To Serve: 3-4 cups baked … [Read more...] about Poutine with Guinness Gravy