Spicy Grilled Flank Steak

1 1-pound flank steak
1 T canola or vegetable oil
2 t ground cumin
2 t chili powder
1/2 t salt
3/4 t ground black pepper
1/2 t red pepper flakes
1/4 t cinnamon
1 t ground coriander

Rub both sides of flank steak with oil. Mix remaining ingredients in a small bowl, and rub over both sides of meat. Grill over medium heat till done (we like ours medium–still slightly pink in the middle), and slice across the grain.