Put oil into skillet over medium high heat. Add turkey to skillet, breaking it up in the pan. Chop up the onion and bell pepper and add to the cooking meat; stirring together to mix. In a small bow, mix together grill seasoning, brown sugar, worcestershire sauce, and tomato sauce. When all ingredients are mixed together well and meat is cooked through, add beans and pour sauce mixture over the meat and stir together well. Turn the heat down to low and cook the mixture for 10 minutes. Serve on buns.