Cucumber flavored. It is used in fish sauces and white aspics. Traditionally their blue stars like blooms are floated in punches. The young fresh plant leaves can be cooked like spinach. One of the better known recipes with borage is the Green Sauce made in Frankfurt. Frankfurter Grüne Sauce, as it is called in Germany, is made from seven herbs: parsley, chervil, chives, cress, sorrel, burnet and borage. In the Spanish regions of Aragón and Navarra, it's also commonly eaten dressed with olive oil and salt.