Soak dates in warm-water as mentioned to soften.
To make the marinade, put each the ingredients in a blender or food-processor & run continuously to blend all of the ingredients till smooth. Stop to scrape down sides as needed and then restart.
Put chicken into a shallow dish or bowl and pour the marinade over. Toss to coat. Cover & refrigerate for a minimum of 30minutes or up to 24hours.
Whenever you're about ready to grill, cut pineapple into rounds as noticed. Cut out the tought-inner-core out of the rounds & place aside.
Heat your grill to high heat or about 500° F. Add the pineapple and chicken to cook and grill, flipping once & basting-chicken with any remaining marinade till cooked-through for 5-6minutes on each-side based on how big the chicken.
Remove the pineapple when it's broiled to your liking or only 3-4minutes each side.
Serve chicken & pineapple together with your preferred side, more than rice or above greens. Enjoy!