Bento Sandwich Salad Telur

Bahan-bahan (1 porsi)

• 2 slices bread of your choice
• 1 soft or hard-boiled egg ((peeled))
• 1 Tbsp Japanese Kewpie mayonnaise
• Diamond Crystal kosher salt ((to taste))
• freshly ground black pepper ((to taste))
• 1 pinch sugar ((optional; a little bit of sugar is a typical ingredient for Japanese egg salad))