At least a couple of hours ahead, pat the steak dry, salt both sides, and set it on paper towels on a sheet pan, uncovered, in the fridge. Let it dry out completely. 2 hours minimum, up to overnight if you want.
Light the grill and bring it up to 550–600°F. You want it scorching.
Grill the steak 2–3 minutes per side (closer to 2 for medium-rare, closer to 3 for medium). Rest it 10–15 minutes, then slice against the grain.
While it rests, build the salad: greens and cabbage piled in a wide bowl.
Right before serving (and not one minute sooner), toss the greens with the vinaigrette.
Arrange the salad on a plate, Lay the tomato wedges around the edge and hit them with salt and a lot of black pepper. Scatter the blue cheese over the top.
Thinly slice the steak against the grain. Pile the sliced steak on top of the salad. Eat immediately.