Preheat grill to medium or oven to 450. Combine beans, rice, cheese, salsa, onion and cilantro in a medium bowl and set aside. Microwave tortillas on High power 15-20 seconds until soft. Center one tortilla on a sheet of aluminum foil 12 x 18 inches each. Spoon ¼ of bean mixture in center of each tortilla. Wrap filling in each tortilla burrito-style. Center each burrito on foil sheet seam-side down. Bring up foil sides. Double fold top and ends to seal packet, leaving room for heat circulation inside. Repeat to make four packets. Grill 12-16 minutes in covered grill, turning once halfway through or bake 18-20 minutes on a cookie sheet in the oven.