In a glass measuring cup, place the tahini, cocoa powder, coconut oil, maple syrup, vanilla extract, cinnamon and kosher salt. Microwave 20 seconds, then stir until full combined and smooth but not hot. Stir in the rolled oats.
Spoon about 2 tablespoons each into the cupcake liners and spread if necessary to make flat cookies in the bottom of the cups. Top with sesame seeds and flaked sea salt. Freeze for 20 minutes. Store refrigerated or frozen. Keep refrigerated as close as possible to serving.