Come by tomorrow (9/27) for the return of the Japanese Sweet Potato Sandwich! What’s inside? Shoyu mayo, roasted-then-fried sweet potatoes, cabbage-green-onion-slaw, and tempura-fried sesame seeds that resemble a many-eyed sea monster. It’s sweet, it’s funky, it’s savory, it’s only here this time of year. Michelle was doing some research and she located the…