9 Remove tart shells from oven working quickly and using the back of a rounded 1/2 tsp measuring spoon gently press a shallow indentation in each shell. (Don't let them cool or it will be harder to get them to form a shell).
10 Bake 2-3 minutes longer or until edges of shells are firm and golden.
11 Let cool in the pan for 5 minutes.
12 Carefully remove from pan and transfer to cooling rack, if they need more shaping you can do that now.
13 Cool completely before filling. Can be made to this point and frozen (but thaw to room temp before filling).
14 For the filling mix together purchased or homemade lemon curd and sweetened condensed milk.
15 Put a small amount of powdered sugar in a sieve and shake a little on the top of each tart, garnish with a long piece of lemon zest.