It is quite wonderful and I wish I could go to Lucille and Otley's and have that pie. They were in Boynton Beach, Florida from 1948 to 1998 but this 1988 ad says they started in the town of Briny Breezes in 1935. Bad Postcards is one of my favorite Tumblrs, by the way, and I recommend that you check it out if you love retro postcards as much as I do.
So I got to wondering about when lemon meringue pie was first made. Lemon meringue pie seems to have been invented just after the Civil War - the first reference I found in a cookbook to it was from 1871. They also made Lemon Meringue Puddings back in the Victorian era, which were breadcrumb-based and baked, after which the meringue layer was added and you put the pudding back in the oven for a final browning.
Unfortunately in 1879 "several persons" ate lemon meringue pies from a bakery and were taken ill because the baker used a "cheap yellow dye" called "dinitro-naphthol." One of the customers took the baker to court and was awarded $1000. The Chicago Medical Journal noted that "persons who are fond of lemon meringue pie, if they go by the verdict, must look out for dinitro-naphthol in their dessert." It was reported in Boston in the same year that people were getting sick from verdigris poisoning - this time it was the meringue in their pies that was the culprit. All the more reason to bake your pies at home, back then.
To make this, you sliced up a large sponge cake and put it into a deep glass bowl. Then you poured a cup of warm milk over it. In a separate bowl you made up what sounds like a basic vanilla egg custard and cooked it until it was thick, then poured that over the cake. Finally you made a batch of meringue flavored with lemon extract (I think they mean juice extracted from the lemon, here) and lemon zest and put that on top. The recipe is here if you want to try it out.
But if you just want to make the classic pie like me, you can use this retro recipe from a 1957 Pillsbury ad.