Steak isn't worth her being angry. It isn't a punishment for her, unless demonstrating my autonomy in eating choices could be construed as a punishment. She proposed the idea. The concept is just to break out of automatic feedback loops of negative emotions by embedding a positive anticipation.

I'm not recommending this to others. But I do recommend a good steak every week or two on a vegan diet.

presumably this is why "make-up sex" is a thing - both parties know that if they argue and resolve the conflict they go to bed right after?

Oh, so it's more of a "I know she's mad at me now, but we're going to resolve this conflict and in the end I get a delicious steak", which motivates you to work on fixing whatever made her mad. Is that it?

I can't fix what makes her mad. She just sometimes gets mad.