In a large bowl, toss together the kale, cabbage, carrots, peas, bell pepper, tomatoes, raisins, and sunflower seeds to combine.
In a small bowl, whisk together the lemon juice, olive oil, mustard, and honey. Pour the dressing over the salad and toss to coat. Season to taste with salt and pepper.
Refrigerate for at least 1 hour before serving, or up to 1 day.