Preheat oven to 450 degrees. Preheat a grill to high.
Season steaks well with salt and pepper. Pound the seasonings in well. Drizzle steaks on both sides with olive oil. Place meat on grill to brown, about 5 minutes each side.
Remove steaks from grill, place on a large cookie tray. Cover top generously with mustard parmesan coating. Top with large piles of parmesan, spreading out to edges carefully with fingers. Place steaks in oven for 8 or 9 minutes.