Example of passing actions from controller to nested component

components.a-teeny-component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  actions: {
  	sendTheForm(info) {
    	alert(info)
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>
{{my-component sendTheForm=(action 'sendTheForm')}}

templates.components.a-teeny-component.hbs

a-teeny-component
{{input value=info}}
<button onclick={{action sendTheForm info}}>submit</button>

templates.components.my-component.hbs

my-component
{{a-teeny-component sendTheForm=sendTheForm}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}