1. Preheat oven to 350°.
2. To prepare beets, leave root and 1-inch stem on beets; scrub with a brush. Place in a 13 x 9–inch baking dish; add 1/4 cup water. Cover and bake at 350° for 45 minutes or until tender. Drain; cool slightly. Trim off roots; rub off skins. Cut each beet in half lengthwise; place in a bowl. Drizzle with olive oil; sprinkle evenly with 1/8 teaspoon salt and 1/8 teaspoon pepper, tossing gently to coat.
3. To prepare bison, sprinkle both sides of bison with 1/2 teaspoon salt and 1/2 teaspoon pepper. Heat 1 tablespoon oil in a large nonstick skillet over medium-high heat. Add half of bison to pan; cook 2 minutes on each side or until browned. Repeat procedure with remaining bison and 1 tablespoon oil. Place bison on a broiler pan; sprinkle with sumac. Bake at 350° for 8 minutes or until desired degree of doneness.
4. To prepare sauce, heat 2 teaspoons canola oil in a large nonstick skillet over medium-high heat. Add mushrooms, shallots, 1/4 teaspoon salt, 1/8 teaspoon pepper, and garlic; sauté for 4 minutes or until tender. Add tomato paste; cook 1 minute, stirring frequently. Add broth, parsley, bourbon, and thyme; bring to a boil. Reduce heat; simmer for 5 minutes. Combine flour and 2 teaspoons water; add flour mixture to mushroom mixture. Bring to a boil over medium heat; cook 1 minute, stirring constantly. Remove from heat. Gradually add butter to mushroom mixture, stirring until butter melts. Serve sauce with bison and beets.