Ingredients

1 cup white miso (also called shiro miso)*

1/2 cup mirin (Japanese sweet rice wine)

1/2 cup sugar

1/4 cup water

1/2 cup mayonnaise

2 lb tuna steak, cut into 1-inch cubes

Preparation

Equipment:8 (12-inch) wooden skewers, soaked in water 30 minutes Heat miso, mirin, sugar, and water in a small saucepan over medium heat, stirring, until sugar has dissolved. Remove from heat and whisk in mayonnaise, then cool to room temperature. Put tuna in a sealable bag (or nonreactive shallow dish). Pour marinade over tuna and marinate, chilled, at least