Issue with the display of ember-engines in-repo

I have a small issue with the way the templates are rendered. I know the application.hbs is loaded first, but I am wondering if we can "skip" it. I am using ember-engines, with the latest version.

Here is a twiddle of my engine.

In it you can see that in application.hbs, I try to access the example.hbs with , but maybe there is a better method than that?

There is an other problem with this method, I have the error :
Assertion Failed: [ember-route-action-helper] Unable to find action exampleAction.

Maybe you can help me understand my error, and I will be thankful for the help.