Belgian Beef and Beer Carbonnade

Ingredients

• 3 lb beef chuck
• 2 -inch pieces
• 2 tsp salt
• 3 tbsp butter
• 3 lb onions sliced
• 2 tbsp flour
• 1 1/2 cup Belgian brown ale
• 1 cup beef broth
• 2 tbsp brown sugar
• 1 tbsp cider vinegar
• 3 sprig thyme
• 2 bay leaves
• 2 slice bread spread with Dijon