White wine and the clam juices are reduced for the base, and parsley butter is whisked in a little at a time, for a kind of beurre blanc.
Over very low heat, whisk in parsley butter about a tablespoon at a time.
For the French, it is an essential component of beurre maitre d'hotel (parsley butter), persillade, bouquets garnis and fines herbes.
"If you don't win now," he told him, "I'll have you grilled in parsley butter with an apple in your mouth."
In England, halibut has always been popular and often shows up grilled with a tomato, and topped with a pat of parsley butter.
Lasagnette al lumache sounded sensational - rippled fettucine with fresh snails and garlic parsley butter.
If that lot want you they'll have you, served with parsley butter on Wedgwood.
There's baked lake fish for supper, so I hear, and some nice parsley butter will go very well with it.
My companion enjoyed peerless bistro steak frites, the steak topped with parsley butter and buried in a haystack of thin crisp fries.
This time I made a quick parsley butter flavored with fresh lemon juice.