To make lemon curd, mix lemon juice, lemon rind and sugar in a pan and put it on medium heat. Make slurry by mixing corn flour and water. When the lemon mixture starts boiling, add corn flour slurry to it and mix it well. When it thickens a bit, turn off the heat and let it cool down at room temperature.
Transfer the lemon mixture into a bowl and add condensed milk. Mix it very well. Now add butter to this mixture and whisk for 3 to 4 minutes to make it a little bit thick. Now let it cool down completely at room temperature. Lemon curd can be prepared in advance and stored in a refrigerator for 5 to 7 days.
To make tartlets, add sugar and butter into a bowl and mix it very well. Now add plain flour to it and make a dough. Do not use water to make the dough. Now cover the dough with a cling film and let it rest in the refrigerator for 30 minutes.
Now take a small portion of the dough and cover the tart mould with it. With the help of a knife cut the edges to make it even. Prepare all tartlets in the same manner. Instead of making small tartlets, one big tart can also be prepared from the same dough. Here I have used 2.5 inch tartlets mould. This dough is enough to make nine such tartlets.
Arrange the prepare tartlets on a baking tray and bake it in a preheated oven at 180 degree for 20 minutes. Now let it cool down at room temperature and demould the tartlets. Tartlet can be used after it is completely cooled down. Tartlets can be prepared in advance and stored in an airtight container for a week.
When the tartlets are completely cooled down, fill them with the prepared lemon curd. Garnish them with a spring of mint and a slice of lemon.
Serve lemon curd tartlets as a dessert or a sweet.
