Preheat oven to 350º.
Put first 6 ingredients in a food processor and blend until crumbly. Add yogurt and turn machine on, adding butter as it processes (it will resemble wet sand).
Press into bottom of 8" springform pan, pressing down to compact.
Bake for 15 minutes until golden brown. Let cool and set aside.
Heat cream over low heat until bubbles appear around the edges. Add chocolate and stir until completely smooth. Pour over cooled crust, sprinkle with sea salt and coconut flakes. Cool before serving.