Spanish Custard Tarts

I just bought some Spanish custard tarts from a local shop who were trialing them, & although im sure that they didnt come from Spain the style was the same i.e. puff bases & gooey custard.

They are wonderfull & I need to make dozens of them to satisfy my hunger. I cant possibly pay $1 each for them if I can make them.

It seemed to have a more luxurious filling than a straight egg custard, perhaps I was just hungry !

Anyone come across these before or made them.

thanks

chow