Heat the oven at 150° C. Blend the biscuits, add the butter and salt. Put 1½ tablespoon of the mixture at the bottom of each mold. Bake for 6 minutes. Meanwhile, beat the cream cheese with the sugar and lemon juice until a homogeneous mixture is obtained. Add the eggs, one by one, and mix well. The cream prepared in this way distribute evenly in the 12 modules. Return the mini-cheesecakes to the oven and bake for another 15-20 minutes. Carefully remove from the baking tray before serving. Garnish with a tablespoon of blueberry jam, a few fresh blueberries and a finely grated lime zest.