Prepare a dish of your choice: Spray with cooking spray, line with baking paper or cling wrap.
Using an electric mixer, add the condensed milk, cream, and lime juice together and mix until thick.
In the dish of your choice, add a layer of the mixture, then a layer of biscuits, repeat until all the ingredients have been used apart from a biscuit or two.
End with a layer of biscuits.
Crumb the left-over biscuits and set them aside.
Place the tart in the freezer for two hours to make sure it sets or in fridge for about four hours.
When set, remove the tart, and place upside down on the serving dish and remove cling wrap or baking paper.
Sprinkle with the left-over crumbs and lime rind (optional).
If having this as a dessert, serve with ice-cream.