Carbonade Flamande Stew | RICARDO

Ingredients

• 1 kg (2 lb) flank steak, cut into 4 pieces
• 30 ml (2 tbsp) olive oil
• 4 large onions, thinly sliced
• 30 ml (2 tbsp) butter
• 30 ml (2 tbsp) all-purpose flour
• 1 bottle 341 ml red or dark beer
• 125 ml (1/2 cup) chicken broth
• 30 ml (2 tbsp) brown sugar
• 30 ml (2 tbsp) balsamic vinegar
• 15 ml (1 tbsp) Dijon mustard
• Salt and pepper