01 - Line an 8 x 8 inch square baking pan with parchment paper, leaving an overhang for easy removal.
02 - In a large mixing bowl, stir together rolled oats, almond flour, sea salt, and vanilla extract until evenly distributed.
03 - Pour tahini and maple syrup into the dry mixture. Mix well until a cohesive dough forms that holds together when pressed.
04 - Press the oat-tahini mixture firmly and evenly into the bottom of the prepared pan.
05 - In a microwave-safe bowl or using a double boiler, melt chopped dark chocolate with coconut oil, stirring continuously until smooth and glossy.
06 - Pour the melted chocolate mixture over the base layer and use a spatula to spread evenly.
07 - Drizzle 1 tablespoon of tahini over the chocolate layer and swirl gently with a toothpick for a marbled effect.
08 - Transfer the pan to the refrigerator and chill for at least 2 hours, or until the chocolate is fully set.
09 - Lift bars from the pan using the parchment overhang, slice into 12 pieces, and serve chilled or at room temperature.