Let the yoghurt drain overnight in a sieve lined with a dishcloth or cheesecloth in the refrigerator. This gives the yoghurt a firm, but very creamy consistency.
Stir the fresh, finely chopped or frozen herbs, mustard, lemon juice and some lemon zest into the yogurt and season with salt.
Goes as a dip with vegetable sticks or as a sauce with grilled vegetables or poultry.