I have to say, this way of cooking ticks a lot of boxes for me. I first came across it in one of the first Jamie Oliver cookbooks some years ago and it has since graced our dining table many a time - and not, as you might imagine, in a gourmet setting, but rather marking the result of a rushed and chaotic day!
The beauty of cooking in a parcel is multi layered, in that it can be extremely nutritious, needing very little added fat to achieve a tender and moist result every time due to the steaming effect the parcel creates. And yet given the parcels are baked, some degree of caramelisation still occurs giving such a beautiful flavour.