Conversation so far:
What is the minit?
Minit Records and later Instant Records, hired Toussaint as an A&R man and record producer.
what music did he produce?
Toussaint played piano, wrote, arranged and produced a string of hits in the early and mid-1960s for New Orleans R&B artists.
did he produce an album?
The early to mid-1960s are regarded as Toussaint's most creatively successful period.

Question: what did he do that was successful during that time?
Self-contained rewrite: what did Allen Toussaint do that was successful during the early to mid-1960s?