Fit the Mincer with the coarse screen and mince the beef into the Kenwood Bowl. For a finer texture pass through the screen again.
Add the herbs, lemon juice and rind and a generous sprinkling of freshly ground black pepper. Using the K Beater at minimum speed, mix the ingredients together.
Divide into 4 and with floured hands shape into thick burgers. Either brush with oil and place under a preheated grill for about 4 minutes on each side, or shallow fry over a medium heat.
Meanwhile make the fried onion rings, dip the rings first into the egg white and then into the flour. Heat 2.5cm (1 inch) oil in a pan and fry for 1-2 minutes, until golden.
Serve burgers garnished with onion rings accompanied by toasted crusty bread, mixed salad leaves and the remaining onion rings.