You'll want to put this sauce on EVERYTHING.
In food processor, pulse first 4 ingredients until coarsely ground. Transfer to bowl. Mix in 2/3 cup oil and crushed red pepper; season sauce. Drizzle fish with remaining 1 tbsp. oil; season. Grill, skin-side down, over medium-high heat, until skin is crisp, about 5 minutes. Turn and cook until opaque in center, 1 to 5 minutes more. Top with sauce.