Make plain Vanilla Custard using some Full-Cream Milk and Vanilla Custard Powder. We need 1 cup of Custard so you might need 1 liter of Milk to get that.
Let it chill and thicken so that we get a hard set custard.
Once the custard has cooled down completely, even better if chilled add the Lemon Curd and whisk it thoroughly.
Take the pre-baked Tart shell and fill it with the Lemon Curd-Custard filling upto 2/3 of it.
Allow it to set in refrigerator for 2-3 hours.
Meanwhile whisk the chilled Whipping Cream with granulated sugar and a few drops of Vanilla Extract and zest of Lime.
Before serving decorate the tart with some of the whipped cream. You may also fill a piping bag fitted with star tip and make florets of the top of the tart.