Rotate A NavMesh Before Moving

I am working on basic click to move kind of game I have movement working find, but I'm having a minor issue I'm stuck on. I can not get the navAgent to rotate towards the hit position before moving. Instead it this slow rotation while the navAgent is moving towards the destination.

I tried transform.lookat but instantly rotates to the direction, but I'm trying to get a slow rotation.

Can someone help me with getting the navagent to slowly rotate to the hitpoint before moving?

 void PlayerMovement() {
       //  RaycastHit hit;
          ray = Camera.main.ScreenPointToRay(Input.mousePosition);
         float remaingdist = navAgent.remainingDistance;
             if (Input.GetMouseButtonDown(0) && navAgent.remainingDistance == 0) 
             {
                 if (Physics.Raycast(ray, out hit, 100))
                 {
 
                 //   Debug.Log("The hit point is " + hit.point);
                               
                 navAgent.SetDestination(hit.point);
                 }
             }
          
         //  
         if (navAgent.remainingDistance > 0)
             {           
                 Anim.SetFloat("Speed_f", .26f);
                
             }
         }

Thanks for any help in advance.