Next level sausage rolls - Good Food Middle East

Ingredients

• 800g sausagemeat
• 100g sage & onion stuffing mixture
• 1 egg, beaten
• English mustard, ketchup or brown sauce, to serve
• 250g pack butter, frozen
• 400g plain flour (or 350g plain flour and 50g white rye flour), plus extra for dusting
• 1 tsp English mustard powder
• 1 tbsp cider or white wine vinegar