Step 1Rinse the potatoes under cold water and scrub them with a vegetable brush. Cut any larger potatoes in half, leaving only the small ones whole.
Step 2Put them in the top of a steamer over boiling water. Cover and let the potatoes steam until they are fork tender, 25 to 30 minutes.
Step 3When the potatoes are tender, remove them to a serving bowl.
Step 4Drizzle the warm butter over the potatoes and stir to coat. Stir in the dill, chives and chervil. Sprinkle with fleur de sel and freshly ground pepper.