Combine anchovies, capers, garlic, butter and parsley in a bowl and beat with a wooden spoon until light and fluffy. Set aside.
Preheat grill on high. Season Huon Salmon portions with salt and grill salmon skin side up till the skin is blistered and golden, about 4 minutes. Flip the salmon over and grill the other side for about 2 minutes.
Top the grilled salmon with a generous spoon of anchovy butter serve immediately with mixed leaf salad.