The boiling of potatoes is a very simple operation, but there is a good deal of talking to be done in connection with it. It does not make any difference whether you use hot water or cold in boiling potatoes. What you want to watch is the stage at which you take the potatoes out of the water. That is what determines whether they are to be mealy or not. The cause of the potatoes being mealy is the rupture of the starch cells and the escape of the steam just at the right moment, just when the potatoes are tender; and if you leave them in the water after they are tender, then the membrane of the starch cells being broken permits the water to penetrate; even if the skins are not cut or broken, the moisture in the starch cells themselves will condense and make the potato heavy, so that you want to give the steam a chance to escape as soon as the potatoes are tender. If you will do that you are sure of mealy potatoes, provided the potatoes are ripe. Unripe potatoes, or new potatoes, or sprouted or frosted potatoes, you cannot well make mealy, because the starch cells in the new potatoes are not fully matured, in the old sprouted potatoes they are disorganized, especially as the little sprouts take up the nutritive properties which enable them to grow. But if you use ripe potatoes, before they are beginning to sprout, and pour the water off of them when they are tender and allow the steam to escape, you will be sure to have the potatoes mealy, unless they are watery potatoes; the ordinary market potatoes will be sure to be mealy. Now you can insure the escape of the steam by draining the potatoes and covering them with a towel folded several times; that is, draining off all the water as soon as the potatoes are tender enough to enable you to run a fork through them. Do not wait until they begin to break apart, because by that time the starch cells are being broken up, and the water will have begun to penetrate to the interior of the potato.
After boiling the potatoes, either in cold or hot water, until they are tender, drain them and put a folded towel over them in the sauce pan. Set the sauce pan on the back part of the stove where the potatoes can not burn, or put it up on a brick on the back part of the stove. The potatoes may be peeled or not, as you choose; if you peel the potatoes in the most careful way, that is, cutting the thinnest possible skin off, you will waste at least an ounce in every pound. A very good way to peel potatoes is to take off just a little rim of the skin all around them and boil them; then if you want to peel them before they go to the table, it will be easy to strip off the two pieces of skin remaining. In order to save time I shall put the potatoes into boiling water enough to cover them, with a tablespoonful of salt. Take about a quart of water and a tablespoonful of salt. I have already said that as soon as the potatoes are tender enough to pierce with a fork, not when they are beginning to break, and they are drained, cover them with a cloth and keep them hot as long as you like. In about three or four minutes after they have been covered with the cloth they will begin to grow mealy, as the steam escapes; and you can keep them hot and mealy for three or four hours. It makes very little difference with potatoes, although with some kinds of vegetables it makes a decided difference, whether you boil them in hard or soft water. But as a rule soft water is best for boiling vegetables. You can always soften the water by putting a very little carbonate of soda in it, to counteract the extreme hardness of the water, which is caused by lime or mineral elements. The hardness of water slightly hardens the surface of vegetables, but it has an entirely different action on meats. It slightly hardens the surface—not enough to make the vegetable tough, by any means, but enough to retain all the juices and all the flavors. Do not have the potatoes tightly covered after they are cooked, because the steam will condense on the inside of the cover and fall back on the potatoes, thus making them watery. In serving potatoes on the table after they are cooked, do not put a cover on the dish; put a folded napkin over the potatoes. Do not put the dish cover on—it will have the same effect that it would have if you put the cover on the pot. The steam arising would condense, and fall back on the potatoes in the form of moisture, and make the potatoes watery.
In baking potatoes, the same general principles apply. That is, at the moment when the potatoes are tender—and that of course depends upon the oven in which you bake them—the starch cells are ruptured and the moisture is at the point of escaping if you give it vent by slightly breaking the potato, then the potatoes will keep mealy for a little while. But baked potatoes deteriorate every moment they stand after they are tender. You should serve baked potatoes just the moment they are done, if you want them to be perfect. If you wrap them up in a napkin it keeps in the steam. The longer they stand, the more of the hard skin forms on them, and if you let them stand for half an hour or more you find the skin sometimes a sixteenth of an inch thick. You can take a little slice off the end without breaking them, to permit the escape of the steam. But serve them just as quick as you can. In sending them to the table do not put the dish cover on them. Throw a napkin over them to keep the heat in. I have found that in baking potatoes that the hotter the oven the better the potatoes would be; that is, the more quickly they would be baked. I have been able to bake them sometimes in twenty minutes.
To soak potatoes in cold water restores a little of their moisture that may have been lost by the natural evaporation. For instance, late in the winter you will find potatoes slightly shriveled. That is caused by the escape of the moisture. If you had weighed them in the fall, and weighed them again at that time you would find they weighed less. To soak them for an hour or more before you cook them is to restore that wasted water and to increase the substance of the potato. There is very little nutriment lost in the waste of the moisture; it is only the bulk of the potato. You do not need to salt the water in which the potatoes are soaked. The only effect of salting water would be to make it colder. In soaking green vegetables it is well to salt the water, because if there are any insects in the vegetables they are killed by the action of the salt. In lettuce, or cabbage, or cauliflower, there are insects that hide away among the leaves, and salt kills them. In regard to the soaking of the green vegetables, of course, directly the insects are dead they naturally fall of their own weight from among the leaves. But if the leaves are closely packed, as sometimes they are in cabbage or lettuce; you want to hold the vegetable by the root and turn it up and with your hands separate the leaves without tearing; if lettuce is used, take care not to tear them; if cauliflower is being washed, take hold of the root and shake it well through the water, so that the motion will dislodge the little creatures.
CHEESE CRUSTS.
For cheese crusts use bread that is a day or two old, baker’s bread or home-made bread; baker’s bread is the best for toast of all kinds, and this is a sort of toast. Cut the bread in even slices, rather small, cutting off the crusts. There is no waste in doing that, for I have already told you how to use up pieces of stale bread by making them into crumbs. Grate some cheese so that you have a tablespoonful of cheese for each little slice of bread. On each of the little pieces of bread put a tablespoonful of the grated cheese, a very little dust of pepper and salt and a small piece of butter not larger than a white dried bean. Put the pieces of bread in a pan, set the pan in a rather quick oven, and just brown the cheese crusts. If the oven is in a good condition it will toast the bread and brown the cheese in about ten minutes, or even less; they are very good, those little cheese crusts. You can use them either hot or cold. They are a very nice supper dish. They are very good with salad at dinner, with any green salad. Of course, if you serve them hot the cheese is a little more tender. Any kind of cheese will answer for making the crusts. I think that the ordinary American factory cheese is about as good as any other cheese. You do not want a rich expensive cheese for cheese crusts.
(At this point the stuffed shoulder of mutton was brought forth, done, the fan-shaped shoulder blade being stuck in to represent the tail of the duck, which the whole dish strongly resembled.)
GRAVY FOR MEAT.
There are about two tablespoonfuls of drippings in the pan. I am going to put a heaping tablespoonful of flour with it and stir until it is brown; then I am going to stir in gradually about a pint of boiling water, and season it with salt and pepper, and then I will send it down and show it to you. Make gravy in this way for any baked meat.