I have a question for any culinary genius out there. The higher the fat content, the more the broth. 5% fat makes almost no broth. So, does the broth come from the muscle part of the meat, or from the fat?
If fat is the answer, then broth contains animal product, but no meat. Even if chunks of meat broke off (as in chicken noodle soup), one could always strain them, and at the same time strain all the gnats.
Not a “culinary genius” here, but on (admittedly) rare occasions I prepare my own stock (or broth – as far as I’m concerned, they’re the same thing). In doing so I use bones that are
not stripped clean. The bones, and consequently whatever meat is still on them, are first roasted, which cooks the meat and concentrates the flavor. One thing that I always do is remove as much solid fat as possible before roasting: I’m looking for roasted bones, not roasted fat. (When the stock is done, I remove the bones and strip whatever meat is there before discarding them. The meat may be added back to the stock or not, depending. Then, of course, I skim any obvious pools of fat.) Still, contrary to what another posted suggested, I would never even think to make a stock using only the leanest meat. A certain amount of fat is needed to carry the flavor. (Plus, any bits of meat in such stock would be so dry and tasteless as to be almost inedible.) Over the years, I’ve come to realize that the bones are the key, both to flavor and minimal grease. The meat on the bones, plus any marrow there may be, have enough internal fat to do the job.
Do I consider stock made that way (even without bits of meat) as Lenten fare? No. Irrespective of the CIC (or, in the case of Orientals and Easterners, the CEOC and Particular Law), it’s made from meat and meat by-products (the bones) and is intended to give the flavor of meat. That’s the deciding factor for me. My thinking goes along the same lines as that Orthodox monk: I know what’s in it, I know how it was made, and I know the purpose of the broth. Others, of course, may think differently when going by the letter of the applicable law.