To make the sauce: In a small saucepan, heat 1 cup heavy cream over low heat (you do not want it to boil, but just to have bubbles start to appear on the surface). In a medium saucepan, heat 1 cup sugar and honey over medium heat until sugar is dissolved and mixture beings to boil. Continue to boil mixture, stirring with a metal whisk every 30 seconds, until it becomes caramel-colored and thin, 4 to 5 minutes. Carefully add 4 tablespoons butter, one piece at a time, and heat and stir until melted. Use caution, as mixture will bubble and sputter when butter is added.
Pour in warm cream and whisk quickly until mixture bubbles up. Remove pan from heat and continue to whisk as the bubbles calm down. Whisk in kosher salt and then set sauce aside to cool to room temperature, about 30 minutes. Transfer sauce to a jar and store in refrigerator.
To assemble the bars: Once the crust has chilled at least an hour or up to overnight, remove from refrigerator and cut into bars. Place bars on serving plates. Using a spoon, drizzle some of the salted honey sauce over each cheesecake bar (or pass sauce at the table so everyone can drizzle their own). Sprinkle a few pecan pieces and a tiny bit of coarse flaked salt over top and serve. Store any leftover cheesecake bars and sauce in the refrigerator.
To make labneh: In a bowl, combine 28 ounces of plain whole-milk Greek yogurt (such as four 7-ounce containers of Fage brand yogurt) and 1 teaspoon of salt. Pour mixture into a bowl that has been lined with a double layer of cheesecloth. Gather cheesecloth around yogurt into a bundle and tie it from a kitchen cupboard handle, with the bowl on the counter beneath the yogurt bundle to catch the liquid. Let the yogurt drain for 24 hours. It doesn't need to be refrigerated, but if this makes you squeamish, go ahead and rig up the system in your refrigerator.
Nutrition information per each of 12 bars:
Calories530Fat42 gSodium110 mg