1 garlic clove, sliced
mustard or horseradish (optional)
250g/9oz button mushrooms, finely sliced
2 shallots, finely chopped
2 tbsp finely chopped fresh tarragon
1 tsp dried thyme
1 large sprig thyme, leaves only
1 tbsp plain flour
500ml/18fl oz beef stock (or consomm茅)
1 tsp black peppercorns, ground
1 tsp dried mustard powder
2 tbsp dripping or oil
2 tsp sea salt
15驳/陆辞锄 butter
butter (or dripping)
2kg/4lb 8oz piece of sirloin, rolled
couple of large baguettes
200ml/7fl oz red or white wine