½ lemon, finely grated zest only
100g/3½oz button mushrooms, sliced
2 large onions, chopped
2 tbsp chopped fresh parsley
100g/3½oz roasted red peppers from a jar, finely diced
1 tbsp chopped fresh sage
100g/3½oz spinach, roughly chopped
salt and freshly ground black pepper
2 tbsp sunflower oil
75g/2½oz mature cheddar, grated
100g/3½oz full-fat cream cheese
1 free-range egg, beaten
500g/1lb 2oz block puff pastry
250g/9oz turkey mince (thigh is good if you can get it)