Which ingredient is NOT mentioned as part of the Lobster Ravioli dish?

The correct answer is that spinach is not mentioned as part of the Lobster Ravioli dish. Lobster Ravioli typically consists of homemade pasta filled with a mixture of lobster and other ingredients, which are often complemented by a sauce that could include tomatoes and cheese, specifically Romano cheese. The focus on lobster as the primary ingredient reinforces the dish's identity, while tomatoes and Romano cheese could be used to enhance the flavor through sauces. Therefore, since spinach is not part of the traditional ingredients or flavor profile associated with this dish, it stands out as the ingredient that does not belong. This understanding helps clarify the specifics of the Lobster Ravioli dish and its components as designed on the menu.