Here goes your custom form

Override HTML by creating a new partial called default.htm (more info here)

You can copy/paste this basic template:

    <form data-request="{{ __SELF__ }}::onFormSubmit">
        {{ form_token() }}
        <div id="{{ __SELF__ }}_forms_flash"></div>
        <!-- YOUR FORM FIELDS -->
        {% partial '@recaptcha' %}
        <!-- SUBMIT BUTTON -->
    </form>