So, the star requested that he refrain from using either butter or cream when making her favorite lemon ... makes a pasta dish that's just as tasty as one with a more standard white sauce.
Stir in heavy cream, miso, Dijon, and 1/2 cup reserved pasta cooking liquid ... as needed to thin sauce. Garnish with Parmesan, and serve with lemon wedges.
Once the scallops are sauteed until brown, a flavorful acid liquid such as dry vermouth, lemon juice or white wine can be added and cooked down until it is reduced, then heavy cream added.