Cake and ice cream, covered in meringue and briefly placed in a hot oven (5,6)
I believe the answer is:
baked alaska
(Other definitions for baked alaska that I've seen before include "Hot and cold sweet" , "Ice cream sponge and meringue dessert" , "Ice-cream and meringue dessert" , "Cake and ice cream dessert" , "Ice cream and meringue dish" .)