Grilled Mahi Mahi with Savory Rhubarb Sauce

Rhubarb is one of the most misunderstood ingredients on menus. It is a vegetable, but used like a fruit. It is a key component of a delicious margarita. It is sour. It is odd looking. It is a stalk. People don't celebrate celery, or cardoons (another stalk that is an artichoke relative in this thistle family) like they do cute fruits, like apples, blackberries, and tomatoes. Rhubarb is known primarily as a "pie plant" because its sour stalks are so frequently paired with strawberries to make pies. Recently, Chef Jay Pierce talked about rhubarb's flavor as a savory fruit. It makes a tangy addition to meats when prepared as a spiced chutney or shines when it is braised with chicken. For salads, consider roasted rhubarb as a topping with walnuts and goat cheese or as a tart addition to a vinaigrette for spring greens. We've paired Jay's savory combination of rhubarb with an abundant spring fish off the coast of North Carolina, mahi mahi.
Photography By | March 15, 2014

Ingredients

SERVINGS: Serves 4
Rhubarb Sauce
  • 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
Mahi Mahi
  • 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

Ingredients

SERVINGS: Serves 4
Rhubarb Sauce
  • 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
Mahi Mahi
  • 4 6-ounce mahi mahi filets
  • Olive oil for brushing
  • Kosher salt
  • Freshly ground black pepper