This salad can be made in advance. You can pre-shred the cabbage (or buy ready-made bags) and add the dressing two hours before serving.
1 small head white cabbage, shredded
1 small head red cabbage, shredded
3-4 shredded carrots
1 cup mayo – stir for a minute to fluff it
3 Tbsp lemon juice
3 Tbsp sugar
1 Tbsp mustard
*Make sure you taste the dressing before adding it to the salad because lemon juices vary in strength.