Sloppy James

In a large skillet, over medium high heat brown the onion and buffalo, about 4-5 minutes. Add bell pepper, mushrooms and cook another 5 minutes. If there is any fat in the pan after that, drain off fat (though not likely as buffalo is incredibly lean). Add tomato sauce, tomato paste, worcestershire sauce, yellow mustard, red wine vinegar, and brown sugar. Simmer together for 8-10 minutes over medium low heat until sauce thickens slightly. Salt and Pepper to taste. Serve in a gluten free rice tortilla or bun.