Tessaro's is getting a subsidy from the butter industry, I'm pretty certain. Everything they serve comes with a glistening sheen of butter, which makes everything delicious and rich, and makes for a bit of heartburn later. Not the worst thing ever.
They make an extremely good steak, perfectly cooked. Their ingredients are excellent. Admittedly I tend to be there just about closing time, but I always get the impression that they can't decide if they are a fine dining establishment or a sports bar where the waitstaff would rather go home than deal with me.
Their steak salad with home fries and grilled onions means the potatoes, onions and sliced steak are on top of the salad. With butter. So all these delicious components don't quite work as a protein on a salad. I know Pittsburgh is famous for potatoes on sandwiches, but it's just an odd layer to work though.
Their steak sandwich and open faced steak sandwich are exactly what it says: a steak sitting on top of a slice of bread. Absolutely delicious, but not something I would pick up with my hands and eat.
Having said all that, the food is well made and they close late. The servers are nice enough without being solicitous, and they haven't turned me away yet.