Seaweed Butter

We developed this compound butter to accompany a gleaming Grilled Seafood Tower, but it works as well simply tossed with boiled noodles as a simple weeknight pasta dinner.

¼ cup white miso
16 Tbsp. unsalted butter, softened
2 Tbsp. ground nori
1 Tbsp. Chinese hot mustard

Stir all ingredients together in a bowl until combined.