Peel onions
and cut into thick slices. Separate the slices into rings. Combine milk
and 1/2 tsp (2ml) salt in a glass baking pan. Add onion rings and let
stand at least 30 minutes, turning rings over in milk often. Heat fat
for deep frying. Sift flour, 1/2 tsp salt and paprika into a bowl. Add
marjoram. Add water and beat until smooth. Beat in oil. Beat egg whites
until stiff but not dry and fold into batter. Dip onion rings in batter
a few at a time, shaking each one to remove excess batter. Fry a few at
a time in hot fat until nicely browned, about 2 minutes. Drain on paper
towelling and sprinkle with salt. Serve hot.