Cashew & lime sauce
Thoroughly mix all of the ingredients, cover and set aside.
Drizzle the avocado slices with lime juice, season with salt. Spread the reserved sauce over the slices of bread. Top 2 slices of bread with the cucumber, lettuce leaves, cress, sprouts and avocado, drizzle the sauce over the top once again, place the remaining slices of bread on top, press down gently.