Arrange a layer of biscuits in a dish of your choice.
Add the caramel condensed milk with the 250g cottage cheese in the bowl of your electric mixer, using a flat beater, that will avoid scraping the sides, beat well until well combined.
When done, carefully add this mixture on top of the tennis biscuits. Arrange another layer of biscuits on top.
Sprinkle 100ml Amarula over the top layer of biscuits.
Heat the milk in a saucepan, take ½ a cup of the milk and mix the sugar, cornflour, and flour to a paste. Bring milk to boil, add slowly the mixture to the milk, take care not to get lumps. Slowly bring back to boil, lower the heat and let simmer for 5 minutes. Make sure it does not burn. Just keep on stirring to avoid it from burning.
Beat 4 egg yolks very well, add the gelatine, blend well, add some of the warm mixtures to this as to warm it slightly, then you add it slowly to the warm mixture whisking, until smooth while it is still on very low heat.
Add 100ml of Amarula to this, whisk again.
Beat the egg whites until stiff and fluffy, add the rest of the Amarula to the egg whites folding and blending slightly then fold into the mixture. Let it cool slightly.
Add the mixture on top of the biscuits.
Crumble the leftover biscuit on the top. Refrigerate overnight.