|Gruyere cheese||4 Ounce, grated|
|Fine dry white breadcrumbs||2 Ounce|
|Vegetable oil||100 Milliliter (For deep frying)|
In a medium sized mixing bowl, beat the egg whites with a wire whisk or rotary beater until they are frothy.
Add the grated cheese and, with your fingers, work the mixture into a soft paste.
Form the paste into small balls by rolling teaspoon fuls between the palms of your hands.
Sprinkle the breadcrumbs on to a sheet of greaseproof or waxed paper.
Roll each ball in the breadcrumbs so that they are coated on all sides.
Place the crumbed cheese balls on a plate and put them in the refrigerator to chill for 2 1/2 hours.
Fill a large deep frying pan one third full with vegetable oil.
Place the pan over moderate heat and heat the oil until it reaches 350°F on a deep fat thermometer, or until a cube of stale bread dropped into the oil turns golden in 55 seconds.
Carefully drop a few of the balls into the oil and cook them for 2 minutes, or until they are puffed and lightly browned.
With a slotted spoon, transfer the balls to kitchen paper towels to drain.
Keep them warm while you fry the remaining balls in the same way.