01 - In a medium bowl, combine rolled oats, milk, yogurt, Biscoff spread, maple syrup or honey if using, vanilla extract, and salt. Stir until smooth and well mixed.
02 - Divide the oat mixture evenly between two jars or airtight containers.
03 - Cover and refrigerate overnight for minimum 6 hours to allow oats to absorb liquid and flavors.
04 - In the morning, stir oats well. Top with crushed Biscoff cookies, drizzle of melted Biscoff spread, and fresh banana or berries if desired. Serve chilled.