Wash herbs. Pluck the thyme and parsley leaves from the stalks, put something aside for garnishing. Chop the rest finely. Cut the chives, except for 2 stalks, into small rolls. Mix curd and milk and season with salt and pepper.
Stir in chopped herbs. Put the herb curd cheese into a piping bag with a large star-shaped spout. Put the crackers on a plate. Spray herb curd on top. Wash the tomatoes, cut them into thirds. Garnish the crackers with the remaining herbs and the third of tomatoes.