AngularJS: lazy loading controllers and content

In this simplified scenario, I have two files: index.htm, lazy.htm.

index.htm:

var myApp = angular.module('myApp', []);
myApp.controller('embed',function($scope){
    $scope.embed = 'Embedded Controller';
});                  
<div ng-controller="embed">{{embed}}</div>    
<div ng-include="'lazy.htm'"></div>

lazy.htm

myApp.controller('lazy',function($scope){
    $scope.lazy = 'Lazy Controller';
});
<div ng-controller="lazy">
    {{lazy}}
</div>

The result is an error: "Argument 'lazy' is not a function, got undefined"

Using a function instead

lazy.htm

function lazy($scope) {
    $scope.lazy = 'Lazy Controller';
}
<div ng-controller="lazy">
    {{lazy}}
</div>

This works until version 1.3 beta 14. In beta 15 was removed the global controller functions: https://github.com/angular/angular.js/issues/8296

So now, what is the better way to get angularized contents of lazy.htm dynamically?

UPDATE:

In this article (http://ify.io/lazy-loading-in-angularjs) I found another possible solution. The $controllerProvider allow us to register new controllers after angular bootstrap. Works like a charm. Tested in v1.3.0-beta.18

index.htm:

var myApp = angular.module('myApp', [])
.controller('embed',function($scope){
    $scope.embed = 'Embedded Controller';
})
.config(function($controllerProvider) {
    myApp.cp = $controllerProvider;
});

<div ng-controller="embed">{{embed}}</div>    
<div ng-include="'lazy.htm'"></div>

lazy.htm

myApp.cp.register('lazy',function($scope){
    $scope.lazy = 'Lazy Controller';
});
<div ng-controller="lazy">
    {{lazy}}
</div>

UPDATE 2:

Two other alternatives that works are:

lazy.htm

_app = $('[ng-app]').scope();    
_app.lazy = function($scope) {
    $scope.lazy = 'Lazy Controller';
};

OR

var $rootScope = $('[ng-app]').injector().get('$rootScope');        
$rootScope.lazy = function($scope) {
    $scope.lazy = 'Lazy Controller';
}; 

But I believe these last two examples should not be used in production.