Lamb burger with pickled red onions, feta & baby gem lettuce

Method

1. To prepare the pickled onions, put the onion slices into a heatproof bowl. Boil the kettle and pour over the slices. Leave for about 1 minute, drain.
2. Add the onions to the rest of the ingredients and allow to marinate.
3. Meanwhile, in a large bowl, mix the lamb mince with the remaining ingredients. Season well with salt and pepper. Put some cling film into the bottom of a mug, add some mince to shape your burger patties.
4. Cook your burger patties either on a hot barbecue, griddle or frying pan until cooked through.
5. Toast the burger buns, add some pickled onions, feta and gem lettuce, adding extra ingredients if you wish.