How to Make It
Combine granulated sugar and lavender in a food processor; process until lavender is incorporated, about 20 seconds. Transfer to bowl of a heavy-duty stand mixer fitted with the paddle attachment. Add butter, cornmeal, and kosher salt; beat on medium-low speed until combined, about 10 seconds. Stir in honey, vinegar, and vanilla. Add cream and eggs; beat on medium-low speed until just combined, about 15 seconds. Cover and chill 1 hour.
Preheat oven to 400°F. Pour chilled honey filling into frozen pie shell. Bake in preheated oven until top is dark brown and filling is set around edges, 45 to 50 minutes, covering edges of crust with aluminum foil after 35 minutes if crust is getting too dark. Remove from oven; sprinkle with sea salt. Transfer to a wire rack to cool completely, about 4 hours.