Combine the boneless chicken, thawed onions and peppers, undrained stewed tomatoes, minced garlic, old bay seasoning, bay leaves, black pepper and chicken broth into a 5 or 6 quart slow cooker.
Use a large spoon to mix the ingredients.
Slow cook on high for 2- 3 hours or low for 3-4 hours. Or until the chicken is cooked through.