Caramelized Banana Ice Cream

Simple recipe but there is a mistake (in my edition at least). You first caramelize the bananas with brown sugar, then make your custard. The problem is there is no instruction as to when you add the bananas to the base. Common sense told me to add the bananas after the custard is cooked, but before the vanilla/rum. I went with that and the results were great! I added a peanut butter swirl which unfortunately overwhelmed the delicate banana flavor. Next time all banana.