I bought a 1/4 grass finished cow (I had a good experience with a 1/2 pig from the same seller, so didnt feel the need to start small).
We cooked some ground beef, and it was fine. But the second cut we tried were the NY strips and the fat on them tasted strongly of fish. I prepared the steak as i would any other store bought steak. I salted then fried in a cast iron pan on high with a little oil, removing the steaks from the pan at 125F. This normally produces steaks I enjoy a lot.
Based on a little research, it is common for grass finished beef to have some odd flavors if you are used to grain finished beef (almost all beef is raised on grass, the difference is what they are fed in the end to fatten up).
So, if all my steaks did taste fishy, is there a preparation method to mitigate the fishiness?
I'm familiar with gamey flavors of meat, having eaten quite a lot of moose, caribou, rabbit and the parts of a cow most people don't seem interested in. This fishy flavor was not like those. The fat tasted like I had bitten into one of those fish oil pills, and it was only the fat that tasted this way, I separated it from the flesh to check.