In a small bowl, whisk together the lemon juice, apple cider vinegar, mayonnaise, and salt and pepper to taste.
2 tbsp. fresh lemon juice, 4 tbsp. apple cider vinegar, ¼ cup homemade mayonnaise, Sea salt and freshly ground black pepper
In a salad bowl, toss in the Brussels sprouts, red cabbage, apple, celery, and walnuts.
4 cups Brussels sprouts, 2 cups red cabbage, 1 red apple, 1 to 2 celery stalks, ¼ cup walnuts
Pour the dressing on top and stir gently until everything is well combined.
Refrigerate and serve cold.