Add the soy sauce, garlic, ginger, mustard, and chicken broth to the slow cooker and mix to combine.
Place the chicken into the sauce and flip each piece to coat them.
Layer the pineapple on top.
Cook on low for 4-6 hours.
In the last 30-45 minutes of cooking, flip the chicken with tongs and place the bell peppers on top.
If you’re making the slurry, remove ¼ cup of liquid from the slow cooker and place it in a bowl. Whisk in the tapioca starch or arrowroot powder until no clumps remain. Pour it back into the slow cooker and mix briefly.
Place the lid back on and continue to cook until peppers are tender (about 30 minutes).
Serve over rice, pasta, or salad.
Video
Notes
If you love a sweeter flavor, use some of the juice from the can of pineapples.If making shredded chicken, it’s easier to use boneless, skinless, chicken breasts. Otherwise, you can use skinless chicken thighs or breasts. Know that having the skin on makes it more challenging to remove. You can use bone-in, you may just have to cook the dish longer until the chicken reaches 165F.