1. To make the dressing, place all of the ingredients except the mayonnaise into a small food processor. Blitz until very finely chopped. Transfer to a large bowl and stir through the mayonnaise. Season to taste.2. Quarter the apples, remove the core and thinly slice. Place in a bowl and stir in the lemon juice. Slice the fennel very thinly and finely shred the cabbage.3. Add the vegetables and apple to the bowl with the dressing and toss to combine. Garnish with any remaining fennel fronds to serve.