These tacos are the best ever! You can use beef or venison. The mushroom trick helps cut back on meat, and you don't even realize it, making this recipe a much healthier and tasty option.
You can use beef in place of venison. Feel free to use mozzarella cheese in place of blue cheese, if you prefer. You can substitute chard for cabbage, as well. If you do, add the chopped stems to the saute pan with the onions.
You might want to add a touch of BBQ sauce to the sauteed meat.