I got 12 mini tarts with the above qty. You can store this at room temp for a day and in fridge for 3-4 days. You can substitute Nestle cream with any thick or heavy cream. I've seen some people using condensed milk instead of cream. If you are using condensed milk, you may need to reduce the qty of sugar used for making caramel. Make sure you whisk the cream lightly before adding, otherwise small granules might be there in the caramel mixture. You can also make Jam tarts using the same recipe. Follow the same method of making the tart base. Put a spoonful of jam in each tart and bake it.