While the burgers are cooking, put together the blue part of the meal: In a mixing bowl, combine the buttermilk, blue cheese, hot sauce and a little salt and pepper. Mix until thoroughly combined.
In a bowl, combine the ground sirloin, scallions, grill seasoning, Worcestershire, black pepper, a little salt and the red wine, and mix until thoroughly combined.
Using the back of your hand, score the meat into 4 equal portions then make each portion into patties about an inch thick. Preheat a large skillet over medium-high heat with 2 turns of the pan of EVOO, about 2 tablespoons. Once it starts to ripple, add the patties and cook for 6-7 minutes on each side, until they reach desired doneness.
Place a burger on top of each toasted bun bottom, top that with some of the watercress and a couple of dollops of the blue sauce. Serve with some fancy chips and celery sticks alongside.