Put the chicken pieces in a pan with the onions and garlic, cover with water, bring to the boil and simmer for 30 minutes or until the chicken is almost cooked.
Drain off and reserve the stock, and dry the chicken pieces.
Melt the lard in a heavy based pan and gently fry the chicken pieces on all sides until they are lightly tanned.

Meanwhile, remove the stems and seeds from the chilis, tear them up and soak the pieces in 300ml boiling water for 30 minutes.
Then pureé the chilis with their water, the onions, garlic, tomatoes, nuts and seeds, spices, seasoning and chocolate.
Remove the chicken pieces from the pan and pour off any excess fat.
Fry the puree in the remaining lard for a few minutes, then add the meat with enough of the chicken stock for the sauce just to cover the meat, and continue to simmer gently for 30 minutes, or until the chicken is thoroughly cooked.
** Ideally the mole should be put aside for 24 hours at this point to allow the flavours to develop.
When you are ready to serve the mole, reheat it, adjust the seasoning to taste, and add a little sugar if you feel it necessary.
Serve it with plenty of tortillas, white rice, beans and guacamole.