Mix all the ingredients together for the burgers in a bowl, chill for 1 hour.
Using wet hands, mould the mix around 4 soaked and oiled wooden skewers in a sausage shape. Brush liberally with oil.
Heat a chargrill or pan grill until hot, add the skewers and cook for 4-5 minutes until cooked and lightly charred, turning them regularly. Remove and keep t