method
1. Cut the kidneys almost in half from the rounded side, pull off the skin, trim the root end and place on skewers. Season and brush all over with oil.
2. Brush the grill bars with some of the oil and place the kidneys in the centre, cut side downward, to seal quickly, then turn them over and grill more slowly, keeping them slightly under cooked.
3. Remove the skewers and neatly arrange the kidneys on an oval flat dish. Place a piece of parsley butter in the centre of each and garnish with the Straw Potatoes and picked watercress; serve the remainder of the parsley butter in a sauceboat on crushed ice.
