1. mail class

                  namespace App\Mails;        
class Email 
{
    

    public $data;

    public function __construct($data)
    {
        $this->data = $data;
    }

    public static function send($data)
    {
       
      
            
        $content = $data['content'];
        $data['email_from'] = "crm@appsline.in"; 
        $data['email_bcc']="manojvijayanaluva@gmail.com";

        $personalized['to'][]=['email' => $data['email_to']];
        if(isset($data['email_bcc'])){
            $data['email_bcc']=explode(",", $data['email_bcc']);
            foreach($data['email_bcc'] as $val){
                $personalized['bcc'][]=['email' => $val];
            }    
        }    

        if(isset($data['email_cc'])){
            $data['email_cc']=explode(",", $data['email_cc']);
            foreach($data['email_cc'] as $val){
                $personalized['cc'][]=['email' => $val];
            }    
        }    
        
        $postData= [
                        'personalizations' => 
                        [                        
                                                                   
                           $personalized  
                               
                        ],
                        'from' => 
                        [
                            'email' => $data['email_from'],
                        ],
                        'subject' => $data['subject'],
                        'content' => 
                        [                        
                            [
                                'type' => 'text/html',
                                'value' => $content,
                            ]
                        ]
                    ];

               
        
        $postData=json_encode($postData);
        
                 
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL,"https://api.sendgrid.com/v3/mail/send");
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);  //Post Fields
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        
        $headers = [
            'Authorization: Bearer SG.ogOyQR19SKiertert2gIBV_A.t4retertertertersjghRpXduCLGrjo8rAQ',
            'Content-Type: application/json'
        ];
        
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        
        $server_output = curl_exec ($ch);
        //print_R($server_output);exit;
        
        curl_close ($ch);

    }
}

2. controller

use App\Mails\Email;

$content['email_to']="manoj@gmail.com";  

$data['content'] = view('emails.order_template', $content)->render();

Email::send($data);

1. Email is the class in App\Mails\Email,php

2. 'emails.order_template' is blade file. Path is resources/views/emails/order_template.blade.php

3. view() is used for loading the blade

4. render() is used instead of return for getting the content of the blade

3. create blade for mail template

resources/views/emails/order_template.blade.php