- Sweat the leeks in butter until soft, add flour, then milk and cream, then season with salt and pepper.
- Cook for approx 8-10 minutes slowly remove from heat.
- Place 1 tablespoon of Piccalilli into each tart case.
- Add the leeks and finish with grated Caerphilly.
- Bake for 8-10 minutes until cheese melts golden brown. Serve with dressed salad.