Step 1

Preheat gas grill for medium-high heat. Combine chicken, drained tomatoes and barbecue sauce in medium bowl.

Step 2

Place four 18x12-inch pieces of heavy aluminum foil on counter. Spray each with cooking spray. Place a flour tortilla in middle of each piece of foil. Spoon meat mixture evenly down center of each tortilla; sprinkle meat with about 1/3 cup cheese. Fold the two lengthwise sides of each tortilla over filling. Double fold top and ends of each piece of foil, leaving space for steam to gather.

Step 3

Place packets on grate; cover grill. Grill 10 minutes or until filling is hot. Carefully open packets. Cut each into pieces and top with sour cream.