library.rb

Module Foo
  Module Bar
    def Bar.get_blah
      # in my case, get_blah actually does a bunch of databag fetching and generates a nice Hash, but access to the node object is what matters here
      return node[:blah]
    end
  end
end

recipe.rb

# Current
b = node[:blah]

# What I want (so I don't have to copy my code into multiple recipes)
b = Foo::Bar.get_blah()