The juice of 2 oranges, 2 eggs, sugar to taste, 1 teaspoonful of white flour (not cornflour), add to the orange juice enough water to make 1/2 pint of liquid; mix this well with the sugar, the eggs previously beaten, and the flour smoothed with a very little water; put the mixture over the fire in an enamelled saucepan, and whisk it well until quite frothy; do not allow the sauce to boil, as it would then be spoiled. Serve immediately.