Sesame seeds are a staple in Japanese cuisine, and this clever gadget grinds them up for sushi, salad, and dessert garnishes. It can additionally be used to grind up flaxseeds, quinoa, and spices.

Making sushi is hard and time-consuming. There’s the monumental amount of prep work, the difficulty in making tender sushi rice, the actual hassle of rolling the sushi by hand. Professional sushi ...