Preheat your oven to 160°C (320°F). Arrange four 8-ounce ramekins in a deep baking dish.
In a saucepan, gently heat the cream with salt and white pepper until it simmers. Remove from heat.
In a bowl, whisk egg yolks until pale. Slowly add the warm cream, whisking constantly.
Strain the mixture and stir in lemon zest. Let it cool slightly.
Divide the crab meat among the ramekins. If using bacon, sprinkle it over the crab.
Pour the custard over the crab (and bacon if using).
Pour hot water into the baking dish, halfway up the sides of the ramekins.
Bake for 30-35 minutes until the custard is set but still jiggly in the center.
Remove from the water bath and chill for at least 2 hours.
Before serving, sprinkle turbinado sugar on top and caramelize with a culinary torch or under the broiler.
Garnish with fresh chives and serve immediately.