The landmark Big Texan restaurant offers its “72-ounce Challenge” daily to anyone who can eat the massive steak, plus fixings, in under an hour. Molly Schuyler scarfed down three 72-ounce steaks, three baked potatoes, three side salads, three rolls and three shrimp cocktails — far outpacing her heftier rivals. That’s more than 13 pounds of steak, not counting the sides. And she did it all in 20 minutes, setting a record in the process.