This recipe came from Cook's Illustrated. They have tried many versions of this recipe and concluded with this delicious recipe. I made it for Easter this year and it got rave reviews. I changed the crust from animal crackers (which they thought worked best) to a shortbread crust. The homemade lemon curd is optional, but well worth the effort and very tasty! Do not let the lengthy directions scare you off. I PROMISE it is well worth the effort!! Had I not made this myself, I would have sworn it was purchased- it was THAT good!!