Preheat a cast-iron skillet or griddle to medium-high. Rub the steak with salt and Szechuan or black pepper.
Whisk up garlic, vinegar, Mirin or sherry, soy sauce, Sriracha and olive or vegetable oil.
Arrange lettuce on a large patter and top with snap peas, radishes, onions, cilantro and nuts.
Grill or griddle meat for 10-12 minutes, turning occasionally. Let rest then thinly slice. Squeeze lime over the meat and drizzling with some Worcestershire sauce. Arrange on the salad, top with dressing and serve.