Laravel 5.1 - Possible incorrect route configuration

I have the following routes set in my routes.php file:

  Route::resource('eventos', 'EventosController');
    Route::group(['prefix' => 'eventos'], function () {
        Route::get('filtrar', ['as' => 'eventos.filtrar', 'uses' => 'EventosController@filtrar']);
        Route::get('/', ['as' => 'eventos.index', 'uses' => 'EventosController@index']);
    });

Using the command line tool php artisan route:list I get the following output:

        | GET|HEAD                       | eventos                                              | eventos.index        | App\Http\Controllers\EventosController@index                  | auth,s
etViewVariables |
|        | POST                           | eventos                                              | eventos.store        | App\Http\Controllers\EventosController@store                  | auth,s
etViewVariables |
|        | GET|HEAD                       | eventos/create                                       | eventos.create       | App\Http\Controllers\EventosController@create                 | auth,s
etViewVariables |
|        | GET|HEAD                       | eventos/filtrar                                      | eventos.filtrar      | App\Http\Controllers\EventosController@filtrar                | auth,s
etViewVariables |
|        | GET|HEAD                       | eventos/{eventos}                                    | eventos.show         | App\Http\Controllers\EventosController@show                   | auth,s
etViewVariables |
|        | DELETE                         | eventos/{eventos}                                    | eventos.destroy      | App\Http\Controllers\EventosController@destroy                | auth,s
etViewVariables |
|        | PUT                            | eventos/{eventos}                                    | eventos.update       | App\Http\Controllers\EventosController@update                 | auth,s
etViewVariables |
|        | PATCH                          | eventos/{eventos}                                    |                      | App\Http\Controllers\EventosController@update                 | auth,s
etViewVariables |
|        | GET|HEAD                       | eventos/{eventos}/edit                               | eventos.edit         | App\Http\Controllers\EventosController@edit                   | auth,s
etViewVariables |
|        | GET|HEAD                       | usuarios                                             | usuarios.index       | App\Http\Controllers\UsersController@index                    | auth,s
etViewVariables |

The problem is that the route eventos.filtrar is not redirecting to the filtrar method in EventosController.

Here's the form that should redirect when submitted to the route in question:

{!! \Form::open(['route' => 'eventos.filtrar', 'method' => 'GET']) !!}

In EventosController@filtrar all I'm doing is dding the request, but all I get is a blank page. Instead of the request object.

public function filtrar(Request $request)
{
    dd($request->all());
}

All the RESTful routes seems to be working fine as well as the route that redirects to the index method.

Any suggestions?

via Chebli Mohamed