To begin, all you have to do is grab these ingredients (pineapple juice, molasses, olive oil, brown sugar, garlic powder, low sodium soy sauce, cider vinegar)for the marinade.(If you happen not to have pineapple juice, you can use the juice from a can of crushed pineapple or pineapple chunks... and then if you do not know what to do with the extra pineapple chunks, make sweet and sour kielbasa, see here, or crushed pineapple .. make pineapple pecan cake with cream cheese frosting, see here)
Whisk all those ingredients together. Place chicken breasts in a Ziploc, pour marinade over chicken and marinade 6-8 hours. Remove chicken, discard marinade, and grill as per directions. Oh nice grill marks , FFH(firefighter husband). Slice the juicy, flavorful chicken. And enjoy. Thumbs up from all the picky kids and from the FFH.