Put the biscuits in a plastic bag and crumble them with a rolling pin. Melt the butter
and mix it with the cookie crumble and 50 gram sugar. Put the mixture as a
bottom in a round cake form. Cut some of the peel from the lime as decoration.
Press out the juice. Beat all egg yolks with 100 gram sugar for 5 minutes; mix
with the lemon juice and the cream. Beat 3 egg whites and add to the yolk mixture. Poor it on
the cake bottom. Bake 30 minutes at 150 degrees. In the meantime beat the last
two egg whites with the remaining 100 gram sugar. Put on top of the cake and put
in the oven (220 degrees), or even better, under the grill for 10 minutes.
Decorate with lime peel.
Key limes are a specific variety of limes, smaller and more sour than the
usual ones. They are not specific to the Keys (islands in the south of
Florida) but do grow there. However, before 1900 the keys were very
isolated and had little fresh food. The key limes were so sour, that they
curdled condensed milk by themselves to make custard. That custard was the
basis of the Key Lime Pie.
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Grate the rind of one lemon and press the juice out of both. Put the gelatin in
cold water during 10 minutes, heat the lemon juice and dissolve the gelatin in
it. Heat the milk, take it off the fire, add the egg yolks and sugar, heat again
but do not cook. When the mixture gets a little thicker, take it off the fire.
Beat the egg whites until they are fluffy. Add the cream to the milk mixture,
then add the lemon juice and rind and the egg whites as last. Put the mixture
into a mould or nice glasses and put it in the fridge for at least 4 hours.
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