To make the mojo, mix onion and garlic, along with the spices, salt and pepper in a bowl. Add these to a pan which has heated olive oil in it. Cook just until onion becomes translucent and then add juice, water, wine and vinegar; simmer about 5 minutes. Allow to cool slightly before serving. Sauce yield: 1/2 cup.
To make the chicken, pierce meat in several places with long fork prongs and place in non-reactive (glass or stainless steel) bowl. Combine garlic and Mojo Seasoning Sauce. Pour mixture over chicken. Cover and marinate in refrigerator for about 1 hour.
Remove chicken breasts from marinade, pat dry and fry them in olive oil until they are golden brown. Place chicken on serving platter and keep warm. Remove onion and garlic from marinade and brown in same pan. Sprinkle over chicken and garnish with parsley.