Whipped egg whites folded into condensed milk and grape juice, set with gelatine. No oven, an hour in the fridge, and the egg whites are not cooked.
The egg whites are whipped and folded in without being cooked, which is normal for a dessert of this kind and worth knowing: anyone pregnant, elderly or immunocompromised is generally advised to avoid raw egg, and pasteurised whites from a carton whip identically. Three sachets of gelatine is a firm set, enough to unmould cleanly rather than eat from a glass. Let the dissolved gelatine cool slightly before it goes in, since heat weakens its setting power. And check the weight on your sachets, because they run from 7 g to 14 g depending on the brand.