This is Alsatian—Jean-Georges is from Alsace—although he says, “They’ll kill you if you use chives as a garnish there.” It’s a simple and unusual pizza-like tart.
Preheat the oven to 400°F. Sprinkle the onion slices with salt; set aside. Put the bacon in a small saucepan and cover with cold water; bring to a boil, drain, and rinse. Mix the fromage blanc or sour cream with salt and pepper to taste, add the nutmeg, and beat in