Grilled Fish Sandwiches with Cilantro Chutney

Name: Grilled Fish Sandwiches with Cilantro Chutney
Ingredients: 1 3/4 cups fresh cilantro; 1/3 cup unsweetened shredded coconut; 1 serrano pepper, stemmed and seeded; 1 1-inch piece ginger, cut into coins; 1 clove garlic; 2 teaspoons curry powder; 3 tablespoons fresh lime juice (from 1 1/2 limes); 1/4 cup plus 1 tablespoon coconut oil, melted, plus more as needed; Kosher salt; 4 skinless halibut fillets (5 to 6 ounces each; 1 to 1 1/2 inches thick); 4 soft rolls (such as Portuguese rolls), split; 1 1/2 cups julienned or shredded carrots; Sweet potato chips, for serving