Brown ground beef in large skillet on medium-high heat. Drain fat.
Stir in Seasoning Mix, pinto beans, tomato sauce, ketchup and chiles. Bring to boil. Reduce heat to low; cover and simmer 10 minutes.
Serve in rolls. Or, place 3 tablespoons meat mixture along center of each warmed flour tortilla. Top with shredded cheese, if desired. Fold over edges of tortillas to serve.