1Sprinkle meat with rub and massage tenderly. Cover and refrigerate at least an hour or longer. Remove from refrigerator an hour before cooking.
2Preheat oven to 300 and prepare a hot charcoal grill or heat a gas grill to high. Place roast on grill and cook for 6-8 mins per side or until an even char develops on all sides. Grill for no more than 20 mins total.
3Remove tri-tip to a baking sheet or oven safe dish. Cover with tinfoil. Place in 300 degree oven for 10-20 mins, or until internal temperature reaches 120F (rare). DO NOT OVERCOOK.
4Rest roast on a cutting board for 8-10 mins, during which time the internal temperature should increase to 125 (medium rare). Slice against the grain. The center should still be distinctly red. THIS IS PERFECT. Bison is supposed to be cooked less than beef and is ideally always served medium rare.
5Serve with grilled veggies of your choice and enjoy!