01 - Flatten each bread slice with a rolling pin until thin and pliable, creating an even surface for rolling.
02 - Arrange one slice each of ham, turkey, and Swiss cheese on every flattened bread piece, keeping edges clear for proper sealing.
03 - Roll each bread slice tightly into a log, pressing gently along the seam to secure the filling inside.
04 - Whisk together eggs, milk, salt, and pepper in a shallow bowl until fully combined.
05 - Dip each roll up into the egg mixture, turning to coat all sides evenly and absorb the liquid.
06 - Melt butter in a large nonstick skillet over medium heat, swirling to coat the bottom evenly.
07 - Place roll ups seam-side down in the pan and cook for 6 to 8 minutes, turning frequently, until all sides are golden brown and cheese has melted.
08 - Transfer roll ups to a serving plate, dust generously with powdered sugar, and serve warm alongside raspberry jam for dipping.