Heat broiler on high and position oven rack about 6 inches from broiler. Line a large baking sheet with foil and spray generously with baking spray.
Season the steak with about 1 tsp. salt and 1/4 tsp. pepper
In a food processor, pulse the pecans, butter, honey, rosemary, salt, and pepper a few times until combined.
Broil the steak 3 minutes on each side. Spread pecan mixture on top and broil an additional 1-2 minutes, until pecans are lightly toasted.
Allow the steak to rest 5 minutes, then slice against the grain.