DOES NOT WORK IN L5.4

Copy the function sendResetLinkEmail() from illuminate\Foundation\Auth\SendsPasswordResetEmails.php and place it in your ForgotPasswordController.php this will override the default function.

Make sure to include these under your namespace:

use Illuminate\Http\Request;

use Illuminate\Support\Facades\Password;

/**
     * Send a reset link to the given user.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\RedirectResponse
     */
    public function sendResetLinkEmail(Request $request)
    {
        $this->validate($request, ['email' => 'required|email', 'g-recaptcha-response' => 'required|captcha']);

        // We will send the password reset link to this user. Once we have attempted
        // to send the link, we will examine the response then see the message we
        // need to show to the user. Finally, we'll send out a proper response.
        $response = $this->broker()->sendResetLink(
            $request->only('email')
        );

        if ($response === Password::RESET_LINK_SENT) {
            return back()->with('status', trans($response));
        }

        // If an error was returned by the password broker, we will get this message
        // translated so we can notify a user of the problem. We'll redirect back
        // to where the users came from so they can attempt this process again.
        return back()->withErrors(
            ['email' => trans($response)]
        );
    }