Sable:

1in a bowl mix flours, sugar, salt and butter untill it resembles bread crumbs (you can rub it between your hands or use a mixer with paddle attachment)
2 add eggs and bring mixture together untill it starts to form a ball
3 roll out thinly between parchment paper/plastic foil and refrigerate minimum 1 hour
4 butter a pie mold and cut doug to fit. Pierce Bottom with fork (preferably rest dough in freezer) preheat oven to 160°C/320°F and bake for about 15 min

Filling: Zest 2/3 limes (preferably in long strands)
And juice 4 of the limes
Whisk the 4 egg yolks untill light and creamy
Add the condensed milk while whisking
Add the lime juice little by little
Pour the filling in pre baked Shell and bake for about 15 minutes

Add the zest, whipped cream and thinly sliced limes on top
(You could also candy some zest it Will give a nice crunchy)