1In a bowl, combine the shredded cabbage, shredded carrots, sliced red onion, and chopped parsley.
2Add the candied pecans to the bowl.
3In another bowl, make the horseradish aioli by mixing mayonnaise, horseradish, maple syrup, salt, pepper, dried parsley, minced garlic, lemon juice, and oil.
4Mix the aioli until smooth.
5Pour the aioli over the salad and mix well.
6Add 1/2 cup of water to help the slaw soak.
7Let the slaw sit for at least 10 minutes before serving. The longer it sits, the better it tastes.