It is at its optimum on the day it is made, but stored in a sealed container leftovers will definitely keep for a few days in the fridge.
See blog post for more details.
You can use a gf cup for cup flour blend as long as it contains a binder like xanthan gum.
Zest the lime: use a fine microplane for the first lime, for the cake batter. If you have a bar zester, feel free to use this to create ribbons for the lime zest to sprinkle over the berries in the filling during assembly.
For the best Lemony Lemon Curd recipe, just click here! The Lemon Curd can be made in advance and stored in the fridge till needed.
Recipe inspired by one found in the book Feast by Nigella Lawson