Sieve the sugar. Beat the egg whites until
they form peaks, then beat in 4 tbsp of the sugar. Fold in the remaining
sugar, flour and nuts. Line 2 oven trays with well-oiled greaseproof
paper and pipe on the meringues in well-spaced rounds about 3-in across.
Bake in a cool oven 100C, 200F, Gas 1/4 for about 150 minutes. Leave to
cool.
To serve,
chill in the freezing compartment of the refrigerator for about 3 hours,
then fill with coffee ice cream just before serving, sandwiching the
meringues together in pairs.