Heat large Dutch oven or pot over medium-high and add oil, followed by bison. Break up bison and continue to cook, stirring often, until browned and cooked through, about 8 minutes. Add cabbage, mushrooms, carrot, onion, garlic, and 2 Tbsp (30 mL) water. Stir and cover, keeping heat at medium-high, for 5 minutes to soften vegetables. Uncover and stir again. Reduce heat to medium and cook uncovered, stirring often, until vegetables are tender, 5 to 8 minutes longer. Stir in basil and mint.
