Beef?
Steak, ground beef and chicken were the last things I could eat. I couldn't do either until 6-8 months out. It did not matter how I cooked it. The first steak I could do was a filet, which was heaven. As you can tell by the replies, we are all different. Approach any new food carefully to see how you will react.
Height: 5'7". HW: 299, Program starting weight: 290, SW: 238, CW 138 - 12 pounds under goal!
My surgeon's instructions were to wait 6 months before eating beef, but I tried some steak at about 4 months. My stomach still takes a bit longer to process beef, but I haven't had any other problems with it.
HW: 248+, SW (RNY: 2/28/17): 244, GW (10/17): 125; LW: 115; 45# regain (19-20); CW: 135.6; new goal: 135; Plastics: Ext mastopexy, Ext abdominoplasty-5/18/2018; diagnosed w/ gastroparesis 11/20.
At 3mo. I could eat all kinds meat, however I had some sort of sauce with it. BBQ sauce, mayo, steak sauce, au jus or small amount. of gravy. At 1 year out now I only require some type of "moisture" with over cooked chicken breast.
Sometimes the way the meat is sliced helps with how we tolerate it. Some stringy cuts, cut against the grain are more easily taken in. Sm. bites, chewed well all the time. What works today may not work tomorrow.
Good luck to you, it will be trial and error...