Let me understand this, you're going to a STEAK house and wanting vegan? And then your upset if they don't have vegan? Same mindset as Going to Mexico and demanding they speak English.
Unfortunately this isn't a direct link to the restaurant. The vegan options, are probably best to be answered if you call them directly. Their salad and grilled options are good. However, I don't know if this will be suffice for what you're looking for.
Thanks! Your answer is awaiting moderation.