Ingredients
- 175g gluten-free flour (we used Doves Farm, widely available)
- 85g butter
- pinch cayenne pepper
- 1 egg yolk mixed with 3 tbsp cold water
- 100g gluten-free breadcrumbs (we used Dietary Specials Gluten-Free bread)
- 100g Caerphilly cheese, grated
- 1 small leek, finely chopped
- 1 tsp mustard seeds, crushed
- 3 egg yolks
- handful tarragon or thyme leaves (optional)