Chop capers, parsley and dill and add half of it to the spread along with lemon zest, salt and pepper. Mix together.
Add the rest of the herbs and capers to a glass along with the oil, lemon juice, salt and pepper (you can also add 1 tsp maple syrup if you prefer it sweeter).
Use a mandoline to finely slice the apple, celery and cabbage and add to a bowl. Drizzle half of the dressing over the salad and toss together.
Divide the Spread mixture between 4 bowls and use the back of a spoon to smear it across the base of each bowl and up one side.
Place the slaw in the centre of the bowl, then top with the avocado, toasted walnuts and the last of the dressing.
