Place the chicken pieces, onion, carrots, bell pepper, and potatoes into the slow cooker.
In a bowl, whisk together the coconut milk, red curry paste, garlic, ginger, chicken broth, fish sauce, and brown sugar until smooth.
Pour the coconut milk mixture over the chicken and vegetables in the slow cooker.
Cover and cook on low for 6 to 7 hours, until the chicken is tender and the vegetables are soft.
Stir in the lime juice just before serving.
Ladle the stew into bowls and top with chopped cilantro.