It is wonderful how long an enamelled stew-pan will retain the heat. It would be a good lesson to an inexperienced cook to watch for how long a period the butter and flour will go on bubbling after the stew-pan has been taken off the fire. It depends of course on the thickness of the stew-pan, but this frying process will go on sometimes for ten minutes, or even longer, after it has been moved on to a cold slab. This fact will explain why hashes and stews are so often tough. Most cooks know hash ought not to boil, but how many place a stew-pan on the fire, and remove it on to the hob directly it begins what they call to simmer! They forget that the boiling, for that is what it really is, goes on perhaps for ten minutes after they have moved the stew-pan from the fire, when a tea-spoonful of cold gravy, or even cold water, would have stopped the boiling at once.
Keep stirring the brown thickening till it ceases to boil or bubble, and then remove as much as you can of the onion, and pour the whole into a stone jar—an empty white jam-pot is as good as anything—and allow it to get cold.
When it is cold it has the appearance somewhat of light-coloured chocolate, and a few spoonfuls of it will always give a nice rich brown look to gravies. It must be put in the gravy, and stirred over the fire in it; gradually, as the gravy boils, it becomes thicker. For ordinary gravy, when brown thickening is used, a tea-spoonful of sherry is a great improvement.
Cooks often thicken gravies, curries, &c., with butter and flour. The effect too often is that the gravy looks a light colour, and has a gruelly taste. A good cook should never be without some brown thickening in the house.
Sufficient of this brown thickening must be added to the curry sauce, which is supposed to have been rubbed through the wire-sieve, to make it as thick as gruel; and, as we have said, this thickening only takes place when it is boiled, and at the same time stirred, over the fire. The curry is now complete, and has only to be poured round, not over, the freshly-cooked sweetbreads.
Suppose, however, the dish required was curried mutton, which is, of course, a much more economical dish than curried sweetbreads, and it is undoubtedly one of the best methods of using up a cold joint. Cut some slices of meat off the cold joint; avoid skin and gristle, and choose those slices as much as possible containing most fat. Then boil up the curry sauce, ready thickened and finished, in a stew-pan, remove the stew-pan from the fire, and place the slices of meat in it, and cover them with the sauce; replace the stew-pan on the hob, but not on the fire, leave it in a warm place for half an hour, and just before turning it out make it a little hotter, if you like, by carefully holding the stew-pan over the fire; but recollect if it once boils or bubbles up the meat will get hard, and the curry will be spoilt.
The proper accompaniment to curry is boiled rice; this ought properly to be served in a separate dish. The rice must be boiled till quite tender, and then the grains should be separated from one another by being tossed lightly about on a cloth in front of the fire.
Curry is, as we have said, the most suitable dish for hot weather, as is abundantly proved by its being the most popular in India. In India fresh tamarinds and mangoes are, I believe, used instead of apples; various herbs and spices are also used, which differ in different parts of the country.
Many persons, especially old Indians, have recipes for curry. We have given what must necessarily form the basis of curry, where the curry-powder or paste is not home-made. By many, the addition of a little grated cocoa-nut to the curry is considered a great improvement; or where cocoa-nut cannot be obtained, a few grated Brazil nuts may be used instead. Others, too, strongly recommend the addition of powdered coriander-seeds. Coriander-seeds are, however, used in making curry-powder, and good curry-powder ought to contain sufficient. When, therefore, the powder is old, and has lost that aromatic smell which it ought to have, a little powdered coriander-seed may be added with advantage; but it has a very decided flavour, and must be used with caution.
One of the most common faults in inexperienced cooks is to have certain fancies for certain flavours, and then to let that flavour predominate.