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Ingredients

• 85.0g unsalted butter , plus extra for spreading
• 4 onions , halved and sliced
• 3 garlic cloves , peeled and smashed
• 1.5kg stewing steak , cut into large cubes
• 850.0ml beef stock
• 1½ tbsp plain flour
• 400.0ml can Guinness
• about 10 thyme sprigs, tied into a bunch
• 2 bay leaves
• 1 tbsp light muscovado sugar
• 2 tsp red wine vinegar
• 2-4 tbsp mushroom ketchup (optional, see Know-how, below)
• 1 celery heart, trimmed and sliced
• about 2 tsp Marmite
• about 25 thin slices French bread (about ¾ baguette - day-old is fine)

Description

This Big Beef Casserole Is All The Beefier For Its Crisp Marmite Toasts

BBC Good Food