Add potato, cheese, onion, mustard, and thyme to apple pie to make it more savoury. The pie looks beautiful because it has both sweet and spicy tastes.
– 30g salted butter – 1 tbsp vegetable oil – 2 large onions, halved and finely sliced – ½ bunch of thyme, leaves picked – 30g plain flour – 500ml vegetable stock – 1 tbsp wholegrain mustard – 1 tbsp white wine vinegar – 450g potatoes (we used Maris Piper), cut into 2-3cm chunk – 3 apples, peeled, cored and chopped into 1-2cm chunk – 150g mature cheddar, grated – For the pastry – 300g plain flour, plus extra for dusting – 70g cheddar, grated – 150g cold butter, cut into cube – 1 egg, beaten