I love love love oysters rockefeller and my favorite way is slightly creamy and cheesy with a hint of anise flavor. I used Ouzo cause it was on hand, but Pernod, Herbsaint or Sambuca would work. Or if you don't want to use liquor you could mince some fennel and saute with the spinach mixture. The addition of optional breadcrumbs makes for a denser topping, but omit it for a creamier version. So tasty I was eating this without the oysters. I think I have found a new decadent vegetable side dish! When I was making up this recipe I meant to add a dash of hot sauce but forgot, and I didn't miss it, but may try next time.