01 - Roll each bread slice with a rolling pin until thin and pliable, ensuring even thickness for easy rolling.
02 - Arrange ham, turkey, and Swiss cheese evenly across each flattened bread slice, leaving edges clear for sealing.
03 - Tightly roll each bread slice into a compact log, pressing gently along the seam to secure the filling inside.
04 - Whisk eggs, milk, salt, and pepper in a shallow bowl until fully combined and smooth.
05 - Dip each roll up into the egg mixture, turning to coat all sides evenly and absorb the custard.
06 - Melt butter in a large nonstick skillet over medium heat, swirling to coat the bottom evenly.
07 - Place rolls seam-side down in the skillet and cook for 6-8 minutes, turning frequently until all sides are golden brown and cheese melts completely.
08 - Transfer to a serving plate, dust generously with powdered sugar, and serve warm alongside raspberry jam for dipping.