• In a medium pot filled with enough water, bring to a boil on medium-high heat. Add chopped potatoes and eggs into the same pot to make it easier.

  Boil the potatoes for 10-15 minutes until fork tender. Hard boil the eggs for 9 minutes, then remove and transfer them into an ice bath. Once the eggs cool down, crack and peel them. Strain the potatoes in a colander.
• To make the Potato Egg Mixture: In a large bowl, mash cooked potatoes, boiled eggs, salt and Japanese mayo together until well combined. Set aside.
• To make the Crab Cabbage Mixture: In a large bowl, combine shredded cabbage, chopped imitation crab with Japanese mayo until well combined. Set aside.

Assemble Sandwich

• For one sandwich: use 4 pieces of bread. Place a slice of bread on a clean working surface. Then spread a layer of the potato egg mixture on top of it.
• Cover the potato egg layer with a slice of bread. Spread jam on top of that slice.
• Place another piece of bread on top of the jam, spread the crab cabbage mixture on top and cover with another piece of bread.
• Place a heavy plate on top of the sandwich to press it down or tightly wrap it in plastic wrap for 5 minutes.
• Remove the plate or plastic wrap, slice off crusts on all four sides with a sharp serrated knife. Slice diagonally. Repeat the above steps for the remaining sandwich.