Potatoes were an important part of the diet a hundred years ago. Here’s what a cookbook said:
Housewives are always interested in new ways of preparing the potato as it appears on the average menu 365 times in the year. There are innumerable ways of preparing potatoes for the table.
When potatoes are practically the only vegetable used in the household, they should always be cooked in their skins, so that all the mineral salts may be retained. When salad plants and other vegetables are used freely, the skins may be removed before cooking, although it is not economy to do so. Sometimes convenience and palatability decide in favor of the latter.
Potatoes, combined with milk and cheese, provide a dish fully as nourishing as when combined with meat. This is interesting to know when meat prices are high.
The Housewife’s Cook Book by Lilla Frich (1917)