If you do give Steel some steak ... no salt, pepper, seasoning on it. Just plain steak and don't make a meal out of it, just a good little taste. I don't think that would be a problem. Dog food has beef, bison, salmon, whatever, all manner of fish and animal protein ... just not large quantities of "pure" protein modern domestic pets systems aren't accustomed to. A large amount of steak might upset his bowels for one thing. And believe me, you do not want Steel to come to expect human food. Just don't get started with that. And NO cooked bones ... ever.
Likely after surgery and as cats5365 mentioned, Steel will have to wear "the cone of shame". Cats gave excellent advice about the CoS. My miscreants have both had to wear the cone after surgery and they get used to it rather quickly. I did have to help them out at random times when they needed ears scratched or something they couldn't get to in the head and neck area. They always appreciated a good scratching and rubbing where they couldn't get to because of the cone. I also adjusted and fitted the cone so I could easily slip it off their heads every now and then but only when I had eyes constantly on them. Mostly I would slip it off when they were eating and I was standing right there the entire time. One other thing, the cone rides best when seated against a good fitting leather collar. The collar will help keep the cone from riding down the neck and into the shoulders area. The cone edge isn't very wide and collar keeps the cone from digging in as well as keeping the cone in a good position where they can't get their muzzle and mouth out around from and into the surgery area. As the surgery site heals and begins to itch a bit, you may find they are quite flexible, determined and bend-y, trying to get at the site.
Even if you THINK Steel isn't paying any attention to the surgery site nor do you THINK he won't try to get at the site and sutures ... Do Not take the cone off and leave him unattended. He WILL betray your THINKING and get at the surgery site. You will feel badly for Steel but leave the cone on at all times for however long the vet says it needs to stay on.
But who knows, maybe there is some kind of procedure where they do internal sutures and maybe he won't even have to wear a cone. One can hope.
The vet will likely give Steel some meds to give him for about a week to 10 days or so. Those meds might include something for pain, antibiotics and maybe an anti-inflammation drug. With Sugar, my suspicious finicky eater, I had to work out a technique where I opened her muzzle with one hand while tossing the medicine to the back of her throat with the other hand, where she was practically forced to swallow it. That worked out well for Sugar but may not work for all dogs and they have pill pockets to hide medicine in or maybe if medicating Steel is an issue, you could hide the medicine in a couple of spoonfuls of canned dog food on top of his kibble ... if that's what you feed.
Even the chewable medicine, I had to toss to the back of Sugar's throat or hide it in food. But with Mason, I didn't have a problem. He would take the chewable medicine and the medicine that isn't chewable, I just offer it to Mason from the palm of my hand and mixed with some bits of kibble ... or hide in some canned dog food on top of his kibble at his regular meal time.
I had Sugar's spay surgery done when she was about 7 months old and just before I thought she was going to come into her first heat. I wish I had waited longer, say until she was 18months to 2 years old and fully matured. I think that might have made her healthier and more structurally sound. Those hormones are important to growth and development. Mason had a large mast cell growth in his groin and it was medically necessary to neuter him in order to get good margins on the mast cell removal when he was about 7 years old. He never marked in the house and has been bomb proof about never messing in the house since he was a young pup. It's been a year or so since his neuter and he hasn't changed much. Actually, the only difference is that now he can never be bred of course. Everything else about him is about the same. I'm just super glad I waited to have him neutered. He fully matured with all his hormones and his growth was complete.
I'm retired and with my dogs 24x7. They are ALWAYS under positive control, from my backyard sanctuary that is enclosed like a prison compound to always having them on lead when out in public. They are NEVER allowed to free roam the neighborhood and they aren't escape artists. So it was that I never worried about accident litters and only wanted the best of health for them in making surgery decisions. Just wish I'd waited longer with Sugar.
I think that covers everything I can say about it and I'm sure Steel will be fine if you listen to and follow your vet's advice for recovery. Maybe I've touch on some things that you might need to discuss further with your vet. Good Luck !!!
got my heart pumping pretty good for a spell there...the cool night air really felt nice.
Giving him that much beef fat can cause all kinds of GI problems for Steel. A relative gave my dog (RIP) prime rib one year that it cost me a bunch of $$$ at the vet in addition to cleaning things up when I got home from work each day until her system was back to normal. 
