Siena Farm's CSA introduced me to watermelon radishes, which look like slices of watermelon when cut (but still taste like radishes).
this recipe, modified to remove the salt pork. I found the braised radishes to be okay, but the husband did not enjoy their bitter aftertaste. I do note that the recipe calls for spring radishes, which might be less spicy than the radishes we have now. Regardless, I won't be braising radishes again, as they weren't a hit with either of us.
In addition to putting radishes in all of our salads, I've been slicing them thinly and putting them on a bagel, atop a thin layer of cream cheese.