I forgot to note the distinction that is made between meat-derived foods, such as gravy, that may not have visible pieces of meat, but that retain the taste of meat due to fat, drippings, broth, etc. Some moral theologians say this is not properly "meat", some say it is. I would settle the doubt in favor of doing whatever one wishes in that regard.
I may have told this story before on here, but abstinence in Poland could be a little creative. One Good Friday, my wife and I were there, and her godmother had prepared a soup with a chicken filet as big as one's hand. When I questioned this, my wife said "oh, it's okay, it's just flavoring", and under this rubric, it was okay to eat the filet as well as the soup. It could be that under communism, food was hard enough to come by, that the bishops granted an indult with leniency such as this, and it was never revoked. I don't know. (This was in the 1990s after the Jaruzelski regime had fallen.)