This is a recipe I found in a very old WI cookbook which I have:
3 whites of eggs
6oz caster sugar
6oz ground almonds
jam and butter icing
Beat eggs until very stiff, add a little sugar and beat again. Fold in rest of sugar and almonds put into a greased tin and bake in a moderate oven. When beginning to firm mark with a small round cutter and continue to bake for another 1/4 hour. When cool put 2 rounds together with butter icing wet the edges with melted jam and roll in the crumbled cuttings.
Hope this is what you were looking for. We have japs up here too.