You know those food memories that swirl deep in your brain? I’ve got one for ambrosia. My grandparents used to make it every Christmas, a stripped-down version that included fresh orange and grapefruit sections, sliced bananas, shredded coconut and maraschino cherries. They left out marshmallows – I happily discovered that creamy version years later – and if nuts were included, I emphatically directed my spoon around them. In fact, I tended to avoid the grapefruit, too, in favor of the sweeter oranges, mild bananas and gaudy cherries. The way those flavors mixed with tropical coconut was a transformative diversion for picky kid weary of casseroles.