Preheat the oven to 190C/170C Fan/Gas 5 and line a baking tray with foil.
Place all the meat mixture ingredients, into a bowl with a good pinch of salt and black pepper. Start mixing with a spoon then finish with your hands to get it totally mixed together.
Divide the meat mixture into 4 and form into burger shaped patties.Heat the olive oil in a frying pan until medium hot, then add the burgers and fry on each side for 45-60 seconds until just browned. Lift out and place onto the lined baking tray. Bake in the preheated oven for 15 minutesuntil cooked through and hot.
Served the burgers in the buns with mustard, lettuce, tomato and onion