Ingredients
- 1/2 cup spicy brown mustard
- 1 1/2 cups small dice rhubarb, about 2 stalks
- 1 cup apple cider vinegar
- 1 cup packed light brown sugar
- 1/2 cup water
- 3/4 teaspoon granulated garlic
- 1/4 teaspoon cayenne pepper, or to taste (Jay uses 3/4 teaspoon)
- 1 small onion, diced
- 1/4 cup tamari
- 1/4 cup Worchestershire sauce
- 4 6-ounce mahi mahi filets
- Olive oil for brushing
- Kosher salt
- Freshly ground black pepper
Instructions
Combine the mustard, rhubarb, vinegar, sugar, water, garlic, cayenne, onion, tamari, and Worchestershire in one-quart saucepan. Place over medium heat, bring to a simmer, and stir until the sugar has dissolved. Simmer until the rhubarb is soft, about 10 minutes. You can make this sauce up to several days in advance. Keep in an airtight container, refrigerated. Gently reheat the sauce before serving.
Brush the fish with olive oil on both sides, then season liberally with salt and pepper. Place on a clean grill and cook for about 3 to 4 minutes per side. You want the fish translucent all the way to the center. Remove to a platter and serve with rhubarb sauce.
Read the story: A Savory Side to Rhubarb