Preparation Preheat oven to 350°F. Pat brisket dry and sprinkle with salt and pepper. Heat oil in a 6- to 8-quart wide heavy pot over moderately high heat until hot but not smoking, then brown meat well on all sides, about 10 minutes total. Transfer with tongs to a platter. Cook onions with bay leaf in fat remaining in pot over moderate heat, stirring occasionally, until golden, 10 to 12 minutes. Remove from heat and transfer half of onions to a bowl. Arrange brisket over onions in pot, then top with remaining onions. Add beer, bouillon cube, and vinegar (liquid should come about halfway up sides of meat) and bring to a boil. Cover pot and braise in middle of oven until meat is very tender, 3 to 3 1/2 hours. Cool in sauce, uncovered, 30 minutes. Transfer brisket to a clean cutting board. Skim off any fat from sauce, then season with salt and pepper. Slice meat across the grain and serve with sauce. Cooks' note:
Preparation Preheat oven to 350°F. Pat brisket dry and sprinkle with salt and pepper. Heat oil in a 6- to 8-quart wide heavy pot over moderately high heat until hot but not smoking, then brown meat well on all sides, about 10 minutes total. Transfer with tongs to a platter. Cook onions with bay leaf in fat remaining in pot over moderate heat, stirring occasionally, until golden, 10 to 12 minutes. Remove from heat and transfer half of onions to a bowl. Arrange brisket over onions in pot, then top with remaining onions. Add beer, bouillon cube, and vinegar (liquid should come about halfway up sides of meat) and bring to a boil. Cover pot and braise in middle of oven until meat is very tender, 3 to 3 1/2 hours. Cool in sauce, uncovered, 30 minutes. Transfer brisket to a clean cutting board. Skim off any fat from sauce, then season with salt and pepper. Slice meat across the grain and serve with sauce. Cooks' note: