Place bell peppers on rack of broiler pan about 5 inches from heat. Broil
peppers, turning occasionally, until skin is blistered and evenly browned (not
burned). Remove pepper to a brown paper bag and close tightly. Let peppers stand
for 20 minutes.
Place chicken on rack in broiler pan. Place broiler pan so top of chicken
is 5-7 inches from heat. Broil chicken for 15 minutes, turning one, until juices
Cut chicken into 1/4 inch strips.
Pare peppers; discard skin. Place peppers and onion in blender or food processor.
Blend until smooth.
Heat pepper mixture, chicken broth, lime juice, cilantro, salt, pepper,
and garlic to boiling in 2-quart saucepan; reduce heat. Simmer for 15 minutes.