In the bowl of a food processor (see note 1), combine the yoghurt, mayonnaise, capers, shallot, dill, chives, miso paste and a generous grind of black pepper.
Pulse until the capers and shallots are finely diced and the mixture is creamy, scraping down the sides as needed.
Add the salmon and the lemon juice. Pulse until the salmon is well combined and the mixture is luscious and creamy.
Transfer the dip to an airtight container and refrigerate for at least one hour before serving with crackers or small toasts. Garnish with more chopped dill and chives, if desired.
