French onion beef stew with Gruyère gratin recipe | Sainsbury`s Magazine

Ingredients

• about 900g beef skirt or sliced braising steak
• 2-3 tbsp olive oil
• 450ml beef stock
• 4 large onions
• 50g unsalted butter
• 4 garlic cloves, sliced
• 2 tbsp light brown sugar
• 1 tbsp chopped thyme, plus extra to garnish
• 2 tbsp plain flour
• 300ml white wine
• 2 bay leaves
• 1 stone-baked white baguette
• 2 tbsp olive oil
• 2 large eggs, beaten
• 1 tbsp Dijon mustard
• 3 tbsp full fat crème fraîche
• 175g Gruyère, grated finely