Lobster Newburg, a traditional gourmet dish, contains high-cholesterol, detritus-eating shellfish and egg yolks, along with high-fat butter and heavy cream. It reminds me of my ex-girlfriendbeautiful but deadly. This recipe, one of my favorites, exchanges oyster mushrooms for the lobster, and substitutes a luxuriant but healthful, mock cream sauce for the dairy and eggs. It reminds me of my current girlfriendbeautiful, healthy, and all-around fantastic.