I am finding that the simplest of flavors such as wines are really quite good in shifting a fruit jam or preserve into a great batch that has some depth. Just as in cooking only use wines that you would drink and enjoy in a glass by themselves.
Radishes are very crisp as a vegetable and they were perfect to pickle. I used a mix color bunch of radishes, but ultimately the color became pink from the skin of the red and purple ones. Here is the simple recipe.