Making the fish stock basically involved chopping up a ton of fish bones (haddock) that we got from Captain Marden's, and combining it with mirepoix of onion, leek and celery that had been sweated, as well as water and a sachet of herbs and peppercorns and simmering it for about 45 minutes. We then strained it and chilled it in an ice bath. For our tasting, we reheated a small amount, first without salt, then with a little salt added. It's amazing how much more flavorful it was with the salt. I learned that you should never salt a stock until you're ready to use it because it can reduce in volume after being heated, leaving it a lot saltier than you might want. That said you should always add at least a teaspoon of salt to a stock or broth before you refrigerate it. This helps act as a natural preservative, allowing you to use the stock for up to seven days versus five if salt had not been added.
I learned a lot about the importance of properly chilling stocks to prevent the growth of bacteria. At home we leave our chicken soup sitting out for hours (sometimes overnight!). I'll try to be better about this in the future because it's pretty freaky when you realize how easy it is for something to start to grow and get funky. Everything in the refrigerators at school is very clearly marked with a date.
Here are a few photos from yesterday.
Preparing sachets for the stock
Mirepoix for the fish stock (left) and chicken stock (right) plus a few fun cuts of carrot and lemon
Chicken stock simmerin' away
Straining the fish stock
Oops, I forgot to take a photo of the final product, but it was a lovely, clear, light color. Sometimes things are strained multiple times or through cheese cloth to clarify the stock of impurities.
Today we are making beef stock and veal stock, then four separate soups from the stocks. I believe the soups will be a consomme, a cream of broccoli soup, a miso soup and a cold cucumber soup. I'm really nervous beacuse I've been assigned the job of sous chef for my group of five (the class has 11 students total - one group of six and one of five). I'm sure it will be fine, it will just involve a lot of delegation and division of jobs etc. You chop 8oz of carrots, you fill this pot etc. And then keeping track of how long everything has to be cooked. I'll give a full report as soon as possible!