You can use dill seed for garnishing on roasted vegetables or soups and sprinkle it on the top of cold cucumber salad. People also use it in potato salad or on roasted or baked potatoes. In not, you can add it over the gravlax, stir it into yoghurt-based dips (try it with tzatziki) or simply chop and add it to the salad. In some cuisines, it is also used to add flavour to lamb, fish and many types of egg dishes. They also give a unique taste and smell if you add them to baked bread. You can also incorporate it into marinades, or sauces.