Cut up onion, bell pepper, carrots, celery, and green onion
Cut chicken into 1-inch chunks
Press or mince the garlic, grate the ginger (a Microplane works great for the ginger)
Whisk the flour, salt, and pepper together in a bowl
In a separate bowl combine the juice, ketchup, honey, soy sauce, garlic and ginger. Whisk to combine well.
Dredge the chicken pieces, a few at a time, in the flour mixture
Heat oil in a fry pan. Brown the chicken pieces, working in batches if necessary. Don't crowd the pan.
Transfer chicken to the slow cooker.
Add peppers, onions, carrots, and celery. Reserve green onions for garnishing.
Pour the sauce over the chicken mixture and stir to coat.
Set slow cooker on low for 2 1/2 hours. After cooking, turn to 'warm' until ready to serve.
Serve over rice with sliced green onions