While salmon fillets are grilling, add avocado, coconut milk, cilantro, lime juice, garlic powder, onion powder, salt, and pepper to taste in a blender or food processor and pulse until the sauce is creamy. If the sauce is not creamy enough, add more coconut milk, 1 to 2 tbsp. at a time.
1 ripe avocado, ⅓ cup coconut milk, ¼ cup fresh cilantro minced, 1 tbsp. fresh lime juice, 1 tsp. garlic powder, 1 tsp. onion powder, Sea salt and freshly ground black pepper