Meanwhile, in a soup pot, heat the oil over medium heat. Add the chicken and garlic and cook, stirring, until the chicken is opaque, about 5 minutes. Transfer to a plate. Add the peanut butter, tamari, curry paste and tomato paste to the pot and stir. Increase the heat to medium-high and whisk in the chicken broth; add the ginger. Bring to a boil, then stir in the cabbage and cook until wilted, about 2 minutes. Return the chicken to the pot and stir in the apple juice.