You could dress this up with fancy this and foo-foo that, but really it still comes down to cool, crunchy cabbage, doesn't it? Here's a simple foundation from which to experiment.
small head (or 1/2 large head) of cabbage, shredded
1/2 small onion, chopped
2 tablespoons evaporated cane juice sugar
1/2 teaspoon salt
2 teaspoons lemon juice
1/2 cup veganaise
freshly ground salt
freshly ground black pepper
Combine ingredients in bowl and toss to coat cabbage. Adjust seasonings to taste.