01 - Combine ricotta cheese, powdered sugar, vanilla extract, and lemon zest in a small bowl. Stir until the mixture is smooth.
02 - Arrange the bread slices on a flat surface. Spread approximately 2 tablespoons of the ricotta filling onto four of the bread slices. Top each with a remaining slice of bread to create sandwiches.
03 - In a shallow bowl, thoroughly whisk together the eggs, milk, vanilla extract, cinnamon, and salt.
04 - Warm a large nonstick skillet or griddle over medium heat. Add 1 tablespoon of butter and allow it to melt.
05 - Submerge each bread sandwich into the prepared egg mixture, ensuring both sides are coated evenly without becoming overly saturated.
06 - Carefully place the coated sandwiches in the heated skillet. Cook for approximately 3 to 4 minutes per side, or until golden brown and thoroughly cooked. Add more butter to the skillet as needed for subsequent batches.
07 - Serve the ricotta-stuffed French toast immediately, accompanied by maple syrup, fresh berries, and a dusting of powdered sugar, if desired.