Ah, dieticians...or, how to pretend to be a medical professional with limited training.
Don't forget, these are the same people who are convinced that pasta and bread don't affect your blood sugar because they break down slowly and steadily.
Just to return back to the original question, an effective way to balance everything out with hypos is an energy drink and a small amount of a banana. The energy drink provides a very quick lift, the banana sugars provide a bit more to keep you on the level, and importantly, bananas contain potassium. Insulin lowers potassium levels as well as sugar and there's a theory that the hypo hangover is the result of low potassium - so boosting your potassium will make you feel less drained after a hypo. Indeed, when someone is hospital treated for DKA, often they will have their potassium levels monitored because the insulin required for treatment might be quite substantial, and therefore lower potassium levels dangerously.