Okinawa-Ryumin "Beni Imo Butter" is delicious! Spread it on bread and toast it to make it look like a "beni imo tart!
I found a rare "Beni Imo Butter" at a local supermarket that was holding an "Okinawa Fair". You don't see it very often in the Kanto area, do you? I had a hunch that it would be delicious, so I bought it.