Filling:

• combine egg, yolk, sugar, lemon juice and zest in pan over low heat. stirring continuously.
• remove from heat and stir in butter immediately.
• cover with plastic wrap and refrigerate while prepping the dough,

Crust:

• soften butter with fork and add in sugar + salt
• add cake flour, almond flour and egg. mix well together until it forms a dough.
• transfer to floured surface and roll out dough with rolling pin. place dough in fridge for 20 minutes.
• remove dough from fridge and press into tart pan(s)
• bake at 350F for 15-20 minutes until golden brown.
• let cool and fill tart with lemon filling.
• finish with lemon zest and a thin slice of lemon