I have to figure out the best way to serve it when we are having guests
The only way I think I can serve it, is to be told 1/2 hour before serving, frost it, blow torch it, then slice and serve.
What do you think of that process?
I haven't done this but can't think of a reason not to try it. Bake meringues separately. Construct the cake and ice cream, keep in the freezer and when ready to serve pop on the meringue. You could "finish" with a blowtorch if needed. Seems easier than having to do it all a half hour before serving.
At Bern's Steak House in Tampa, they used to keep the cake squares and ice cream squares in the
freezer. Upon ordering the dessert, the pastry dept would whip up the meringue, coat the stacked cake/ice cream slab and send it downstairs for table-side flaming with booze. I often wondered how difficult the frozen cake/ice cream slab would be to cut through.