How to make Nigella Lawson's Flourless Chocolate Cake Part Two

Separate eggs into two bowls.

Beat the 2 whole eggs and 4 egg yolks with 1/3 cup of the sugar, then gently add the chocolate mixture, tempering first (tempering means you add a little of the warm mixture to the cooler mixture to raise its temperature and prevent it from curdling as you add the rest of the warm mixture).

In another bowl, whisk the 4 egg whites until foamy, then gradually add the remaining sugar