PLACE red peppers on grill over hot coals or on rack of broiler pan 3 to 4 inches from heat. Grill or broil 8 to 10 minutes or until skin is blackened, turning several times. Place in paper bag; close top. Cool. Remove peels and seeds from peppers; discard.
PLACE red peppers in blender or food processor container; cover. Process until smooth. Set aside.
PLACE fish on greased grill over medium coals or rack of broiler pan 3 to 5 inches from heat. Sprinkle with seasoning. Grill or broil 5 to 10 minutes or until fish flakes easily with fork.
MIX VELVEETA and pureed red peppers in saucepan; cook on low heat until VELVEETA is melted, stirring occasionally. Place hot pasta on serving platter; top with fish. Pour red pepper mixture over fish.