Blend the marinade ingredients together in a processor or with a hand-held blender until the ingredients are well combined and the garlic cloves are well puréed. Slice the chicken breasts into cubes.
Pour the mixture over the chicken pieces and marinade for 4 to 8 hours. Thread the chicken pieces onto soaked bamboo skewers and alternate with grapes, lemon quarters and petals of red onion. Cook on a hot griddle pan for 5-8 minutes a side. Serve with a glass of chilled Durbanville Hills Rosé.
(Recipe courtesy of Durbanville Hills)