Roasted Carrot Bun

Name: Roasted Carrot Bun
Ingredients: 1 cup ripe blueberries, sliced ¼ inch thick; 1 teaspoons gochugaru; ½ teaspoon sea salt; ¼ cup rice vinegar; ¾ pound carrots, peeled; 1 tablespoon wasabi powder; 1 teaspoon salt; ¼ cup olive oil; 2 tablespoons prepared horseradish; 1½ tablespoons lemon juice; ½ cup water; ⅓ cup sunflower seeds, soaked