Place the mixture in a springform pan (7 inches) and press with a flat and heavy object to form an even layer of the base. Place in the freezer for 20-30 minutes.
To Bloom Gelatin
Place a heatproof bowl over a hot water bath. Mix 2 tablespoon of gelatin powder with ½ cup warm water. Stir at regular intervals until fully dissolved.
For Mousse
Mix condensed milk, cream, lemon juice, and milk in a bowl. Now add bloomed gelatin and mix well. Pour the lemon mousse over the biscuit base.
Refrigerate again for at least 2-4 hours until set.
For Lemon sauce
Mix all ingredients of lemon sauce and heat over a pan with constant stirring until thickened.
When the mousse is set, pour lemon sauce gently over the dessert.
Slice the cake and serve.
Video
Notes
This dessert can also be set in a 1 liter casserole or similar dish if the springform pan is not available.
You can add ½ cup cream cheese to it if you like it rich.
You can make biscuit base without almonds too but almonds really give a crunchy kick to the plain biscuits.