Wash radishes well (they can be pretty gritty).
Remove ends and thinly slice (this could be done ahead of time).
Preheat a sauté pan to medium-high.
Add 1-2T grass fed butter (or olive oil) and radishes, cooking for 6-8 minutes, stirring occasionally. Season w/ salt.
That's it! Cooking the radishes takes away any bitterness.