Cut your apples first and toss them with the lemon juice to prevent browning. Combine the apples, cabbage, and fresh mint in a large serving bowl. In a small bowl, whisk together the oil, vinegar, and sweetener. Pour the dressing over the slaw and toss well to coat.This recipe will keep for 3 or 4 days in the fridge, but looks prettiest in the first hour or two, before the red color seeps into everything. So if you're bringing it to a party or serving it to guests, don't dress it until right before serving.