• In a large bowl mix together the lamb, shallot, Worcestershire sauce, mustard, chilli powder.
• Divide the mixture into 16 walnut-sized balls and flatten into burger shapes.
• Heat the oil in a large non-stick pan until hot or grill. Gently cook the burgers for 2-3 minutes on each side until firm to the touch and any meat juices run clear. Alternatively, cook the burgers under a moderate grill or on a prepared barbecue.
• Spread the base of each burger bun with the relish.  Add the Feta, more relish then top with the burger lid. Secure the burger with a cocktail stick and serve.

Chef's Tip:

Try the burger using a variety of combinations such as:

 Plum chutney with Halloumi cheese and fresh coriander leaves.

 Onion relish with Cheddar cheese and fresh parsley leaves.

  Mozzarella cheese, cherry tomatoes, fresh basil leaves