Rinse the 12 radishes under cold water and trim the radish greens from them. Pat them dry with a towel.
Remove 3 tablespoons butter from the refrigerator and allow it to sit at room temperature until it becomes soft.
Use a paring knife to snip the roots off of the end of the radishes and cut them in half.
Once the butter is soft enough to mash, use the back of a spoon into a creamy thick paste.
Arrange the radishes on a platter along with the smashed butter and sprinkle the butter with sea salt.
Notes
Store leftovers in the refrigerator in separate containers for up to 4 days.Save the radish greens and saute them with garlic or add them to your salads.