It goes well with anything. You can add it to soups or salads or pastas to make something simple/boring - divine.
Eg Cauliflower soup (onions, cauliflower, chicken stock boiled and pureed) drizzle this on top before you serve. Great starter.
Alternatively, just Google search "Truffle Oil" and "recipes" (I would add "Italian" in the search, because I like Italian food). You will have so many hits you won't know how to choose.