Hi, I'm new here and I already have a problem to post. I make these cute little Lemon Curd Tartletts and the problem is once they've cooled down they get a split in the curd. What's going on here? Do I have the oven too high (140C) or are they cooked too long (approx 13min). The curd is a really simple one where you just beat up the eggs, sugar, lemon juice and cream and pour into tart cases -simple! So where am I going wrong - can any one help me?