I have a sweet potato casserole can I caramelize sugar on top for a cruncy topping?
if you're trying to go for a creme brulee effect, i'd try it. at least it would become a little crispy and a little runny as long as it doesn't burn. my favorite topping is toasted, buttered fresh breadcrumbs tossed with a little herb of choice. it adds a nice crunch with an oh, so buttery goodness that is so nice with mashed sweet 'taters.