Mahi-Mahi Burgers with Pineapple Slaw

Ingredients

• ½ red onion, thinly sliced
• ½ cup Greek yogurt
• ½ cup coconut milk
• 1 tablespoon balsamic vinegar
• 1 tablespoon black sesame seeds
• salt, to taste
• 2 cups shredded red cabbage
• ½ cup chopped fresh pineapple
• neutral oil, for brushing
• 1 pound fresh mahi-mahi, finely chopped
• ¼ cup thinly sliced scallions
• 1 tablespoon minced fresh parsley
• 1 clove garlic, minced
• 1 teaspoon minced fresh ginger
• 1 egg, lightly beaten
• 2 teaspoons soy sauce
• 1 cup plain breadcrumbs, such as panko
• ½ teaspoon ground coriander
• freshly cracked black pepper, to taste
• 4 kaiser rolls
• olive oil, for brushing
• lime wedges, for serving