01 - In a medium mixing bowl, blend the softened cream cheese, powdered sugar, and vanilla extract until completely smooth and creamy. Gently fold in the fresh blueberries, taking care not to crush them.
02 - Lay out 4 slices of bread. Evenly distribute the cheesecake filling onto each slice, leaving a small border around the edges to prevent overflow. Top each with a remaining slice of bread and press gently to seal.
03 - In a shallow dish, whisk together the eggs, milk, granulated sugar, vanilla extract, ground cinnamon, and a pinch of salt until fully combined and smooth.
04 - Melt the butter in a large skillet or griddle over medium heat, tilting the pan to coat the surface evenly.
05 - Dip each assembled sandwich into the egg custard, coating both sides thoroughly but briefly — avoid soaking too long or the bread will become soggy. Place the sandwiches in the hot skillet and cook for 3 to 4 minutes per side until golden brown and heated through.
06 - Transfer to plates and serve immediately, garnished with additional blueberries, a generous dusting of powdered sugar, and a warm drizzle of maple syrup.