1 small celeriac, peeled and cubed into 2cm/¾in pieces
2 heaped tbsp hot horseradish cream
2 small leeks, trimmed and finely sliced
chopped fresh parsley, to garnish
40²µ/1½´Ç³ú plain flour
2 tbsp Worcestershire sauce
425ml/¾ pint good-quality beef stock, hot
1 tsp ground ginger
2 tsp paprika
1 tbsp sunflower oil
25g/1oz butter
750g/1lb 10oz braising steak, cut into 2cm/¾in cubes