They’re exactly a variation on Cornish Pasties - they were developed in the Caribbean after the Cornish Pasties had been introduced there.
Traditionally, they’re made with Scotch Bonnets; but they’d be good with Jalapenos, too.
-JT
Yes, I think I’ll have to use jalapenos.
There’s a fun episode of The Two Fat Ladies in which they do Christmas in Jamaica - making Jamaica’s famous black cake. Most of it, though, is Jennifer Paterson moaning about the heat.