Cheesy steak and mushroom turnovers recipe | delicious. magazine

Ingredients

• 30g butter, plus an extra knob
• 30g plain flour, plus extra to dust
• 300ml whole milk
• 80g strong cheese, such as gruyère, cheddar or stilton, cut into small chunks
• 2 tsp dijon mustard
• Small handful chopped fresh tarragon (or use parsley if you prefer)
• Splash olive oil, plus extra for brushing
• 1 small onion, chopped
• ½ celery stick, chopped
• 100g mushrooms, quartered
• 300g lean British free-range rump or sirloin steak, at room temperature
• 500g all-butter puff pastry
• 1 large free-range egg yolk, beaten
• You’ll also need…
• 18cm side plate