Filling for Caribbean roti
Like a lot of Caribbean cuisine (curries, rice and peas, chilli), these are based on the Indian equivalent, brought by indentured labourers from the sub-continent.

There's a recipe here: http://www.food.com/recipe/caribbean-trinidad-roti-288544 - generally fillings are vegatable-based and usually include sweet or regular potato, chickpeas and curry and chilli powder.

If you like them you may also enjoy Indian stuffed-parathas (here's a recipe you can try) - the original and IMHO, the best ;-)