Flemish Beer Stew

Ingredients

• 6 tablespoons butter
• 6 medium onions, sliced
• 4 pounds boneless beef, cut into 1 1/2 inch cubes
• 3 tablespoons flour
• 1 cup beef broth
• 2 cups beer
• 2 tablespoons red wine vinegar
• 1 clove garlic, finely minced
• 2 tablespoons parsley, minced
• 2 bay leaves
• 1/2 teaspoon thyme
• salt and pepper to taste