Chicken And Tarragon Pie Recipe | Tesco Real Food

Ingredients

• 375g lighter ready rolled puff pastry, cut into 4 rectangles
• 1 tbsp butter
• 1 onion, finely chopped
• 200g chestnut mushrooms, quartered
• 3 tbsp plain flour
• 1 tsp mustard powder
• 1 chicken stock cube, made up to 400ml
• 2 tbsp red wine vinegar
• 300g roast chicken, roughly chopped
• 3 tbsp fresh tarragon, chopped
• 100g frozen peas
• 1 egg, beaten