Japanese 7-Eleven Egg Salad Sandwich

20min · 1 serving Need a vegetarian sandwich recipe? This easy Japanese 7-Eleven Egg Salad Sandwich is a great idea to add to your list. Kewpie mayonnaise is key along with fluffy Japanese-style milk bread and just the right ratio of egg whites to yolks. Make these egg salad sandwiches ahead for an easy, quick lunch for work or school. Ingredients • 5 large eggs • ¼ cup Kewpie mayonnaise • ½ teaspoon kosher salt, plus more to tastes • ½ teaspoon granulated sugar • ⅛ teaspoon black pepper • 2 teaspoons heavy cream • 1 tablespoon unsalted butter, softened • 2 (1 1/2-ounce) Japanese milk bread slices (1/2 inch thick)