Directions: Combine mustard, brown sugar, salt and turmeric in processor or blender and mix well. With machine running, add 10 to 12 oz beer through feed tube in slow steady stream and blend until mixture is smooth and creamy, stopping frequently to scrape down sides of work bowl. Transfer to jar with tight-fitting lid. Store in cool, dark place. An easy to prepare mustard that is good with sausage, cold cuts, or as an accompaniment to an English plowman's lunch of cheese, bread, pickled onions, and radishes.