1 cup red wine vinegar
1/3 cup cane sugar
1 (2-inch) cinnamon stick
Kosher salt and fresh ground black pepper
1 cup fresh blueberries
1/2 cup sliced red onion
4 (6 to 8 ounce) Alaska Halibut fillets, fresh or thawed
11/2 tablespoons olive oil
1/2 cup microgreen herbs
Stir together 1/3 cup water, vinegar, sugar, cinnamon, 11/4 teaspoons salt, 1/2 teaspoon pepper in a medium saucepan. Bring to a simmer stirring until sugar and salt are dissolved. Remove from heat and stir in blueberries and onion. Let stand until completely cooled, about 2 hours. If desired, cover and chill until ready to use, up to 1 week.
Pat the halibut fillets dry with clean paper towels. Sprinkle halibut evenly with 1 teaspoon salt and 1/2 teaspoon pepper. Heat a large heavy skillet over medium heat until hot; add oil swirling to coat. Add halibut fillets and sear until golden brown on one side, about 3 to 4 minutes. Turn fillets over and sear until golden and just cooked through, about 3 minutes.
Arrange seared halibut fillets on a serving dish. Using a slotted spoon, top halibut fillets with desired amount of blueberry mixture. Sprinkle with microgreens. Serve immediately.