Whip together the butter, honey and lavender in a food processor or blender.
Add carrots to a sheet pan. Dollop honey butter on top.
After five minutes, toss the carrots in the butter (it should be more melted by now). Roast for 10-15 minutes more, until carrots are tender but not mushy.
Add salt and pepper, and, if desired, add more honey and crushed lavender.