In this post to his site Abdul Malik Ikhsan shows you how to use a middleware class that does some extra routing as a "controller" in your Zend Expressive application.

If you are familiar with frameworks with provide controller with multi actions functionality, like in Zend Framework 1 and 2, you may want to apply it when you use ZendExpressive microframework as well. Usually, we need to define 1 routed middleware, 1 __invoke() with 3 parameters ( request, response, next ). [...] What if we want to use only one middleware class which facilitate [multiple] pages?

He shows how to take a sample route configuration for an "album" endpoint and handle it via an AbstractPage class that performs a bit of reflection on the request to route things the right way. Then the "controller" is created by extending this abstract class and functions are defined for each action, complete with access to the request, response and next middleware objects.