2 tbsp finely chopped fresh chives
pinch each of salt and pepper
1 tsp gluten-free baking powder
1陆 tbsp mustard powder
340g/12oz gluten-free self-raising flour, plus extra for dusting
85g/3oz cold butter, cubed
200g/7oz extra mature cheddar, grated
1 free-range egg, beaten
180ml/6fl oz semi-skimmed milk, or any milk of your choice