All I can eat at those temperatures (22 °Ré & °Rø - nice coincidence but not what I'd like to have at home at bloody midnight) is a mixture of youghurt and Bulgarian white cheese (for those of you having no idea what the latter is, think of feta, only better*). Gives you proteins, fats, salts, micronutrients and water, and if you add a spoonful of honey at the end, you've got a dessert, and carbohydrates plus other stuff as well. If you insist on fibers, add a slice of rye bread. If you're bold, adventurous, or @Night Prowler , add an egg.
* Perhaps I should try to sell this phrase to one of our ministries - agriculture maybe, or tourism** .
** Admittedly, it depends heavily on the manufacturer and, often, the particular batch. Feta is much more stable in that aspect.