Marinate for 1 hour up to 24 hours in an airtight container in the refrigerator.
Cook the marinated chicken for 2-3 minutes on the first side, then flip the chicken pieces over to sear the other side for another 2-3 minutes. Transfer the chicken to a plate.
Add the onion, red pepper, and jalapeno to the pan. Stir so that they do not burn and cook for about 5 minutes, until they start to soften.
push over the veggies to make space for the pineapple pieces. Add the pineapple and let brown for just a minute.
Add the black beans and then mix everything together. Add the sauce and half of the cilantro stir to combine.
Finally, mix in the chicken and cook for a final 3-5 minutes.