iblock9,
Wonderful job on the fish!
Nine years ago, after twenty years of experience working in high end hotels and clubs, I took the job as chef of The Standard Club of Chicago. By trial and error, I've figured out how to produce the classics in high volume without sacrificing quality. I have memories of my mother's gefilte fish, which is what I base my version on, but back in those days, I had no interest in the fish other than enjoying it every Pesach. I had to rely on classic Jewish cookbooks as well as experimentation.
I made 150 lbs. of gefilte fish a few days ago. We average between 1000 and 1100 covers between our dining room buffet, about 25 private seders, and to-go orders. I ordered 150 lbs. whitefish and 150 lbs. walleye pike, and had it sent already filleted, in order for my butcher to grind. Just as you say, the yield is about 50%. 300 lbs. whole fish = 150 lbs. of fillets. One year, I included 1/3 carp which I believe is classic, and I wasn't at all pleased with the color.
Some of our veteran cooks talk about an older club member, who came in and supervised the gefilte fish production
for many years and used buffalo fish for the broth.
We mix our fish, eggs, matzo meal, grated onion and seasonings in 4 batches in a Hobart 80 qt. mixer and then pat out in oval patties. I taste the mixture batch by batch in it's raw state. Starting a week out, our production saucier makes 3 ea. 200 lb. batches of fish fumet using snapper, grouper or halibut bones which we purchase. When I say trial and error, I learned the hard way that when preparing such a large quantity, you never have enough broth. If anything, the ocean fish fumet is cleaner, lighter in color and flavor, as well as less fatty than using the fresh water fish bones. We poach the fish in 60 gallon steam jacketed kettles and remove after several hours of simmering. Gelatin is added and the broth is quickly cooled in a cooling tank, stirring frequently. I test the strength of the jelly by freezing a small amount on a sheet pan.
You'd think that 600 lbs. worth of fish fumet would yield a very gelatinous broth, but I still need to add between one and two pounds to achieve a nice jellied consistency.
We typically do 500 pounds of first cut brisket for the holidays, which is now supplied to us by Excel, thanks to being turned on to it by GWiv.
Today we rolled and cooked about 5000 or so petite matzo balls. Our 100 gallons of double chicken consomme was finished last week and frozen. Tomorrow, 80 lbs of chopped liver, which will be finished with 2 to 3 gallons of duck fat from Hudson Valley Foie Gras Co.
iblock9, I enjoyed reading about your gefilte fish experience. Have a wonderful holiday.
"Bass Trombone is the Lead Trumpet of the Deep."
Rick Hammett