Remove the pulp from the preserved lemon and discard. Add the preserved lemon rind to a food processor with the lemon juice, garlic, cumin, paprika, oil, pepper and coriander leaves and process until smooth.
Wipe the chicken breasts with damp paper towel to clean, then smear the marinade over each of them.
Set aside to marinate in the fridge for 1 - 2 hours.
BBQ on a hot oiled grill plate for 20 minutes.
Serve with green salad.
Note: Apartment dwellers can get a taste of outdoor eating by investing in an electric grill.