Knead the bread with crushed garlic and chopped parsley. Mix the mustard and water. Cut each kidney in half and skewer 4 halves on each of 6 broiling skewers. Broil 4 minutes on each side on a barbecue or broiler.

Remove the kidneys and place in an oven dish. Cover with the mustard and the prepared bread. Roast in a hot oven for three minutes and serve.