Mustard rub and sauce for grilled flank steak

This spice rub and sauce is great for other cuts of steak too, but I particularly like it for flank steak, where you have a lot of surface to soak up sauce, due to the thin slicing technique. (See my post on Flank steak techniques to refresh your skills!)

This recipe is enough for one steak, 1 to 1-1/2 pounds. You can do the rub in the morning and let the steak sit in the fridge all day if you want.


Mustard Rub and Sauce

Rub:
1/4 c brown mustard
1 T ground cumin
1 T chili powder
Salt and pepper

Sauce:
1 T catsup
2 T honey
2 T red wine vinegar
1 T canola oil
Clove of garlic, minced
2 T fresh oregano, chopped

Mix the mustard, cumin, and chili powder together and rub the steak. Place in a shallow dish and refrigerate for at least an hour. Mix the catsup through oregano in a small saucepan. You can spoon some of the sauce on the steak as it’s grilling, and save the rest to serve with the sliced steak. Heat the sauce gently if you’d like.