transform.Lookat problem

Hello

I am making a missile shooting game, and I have run into a issue.

When I fire my missile I want it to look at the direction that the mouse is facing.

I sorta got this to work..... I used transform.LookAt() and what is happening is the missile is spawning side ways...... now sure why. So its semi working. Is there a way to make it spawn with the tip facing where I clicked?

  public float timeKeeper = 0;
     public float fracDist = .01f;
 
     public Transform boomObj;
 
     void Start ()
     {
         GameMaster.targetPosition = GameMaster.objPosition;
         GetComponent<Transform>().eulerAngles = new Vector3(0, 0, -15);    
     }
     
     void Update ()
     {
         timeKeeper += Time.deltaTime;
 
         if(timeKeeper > .04)
         {
             fracDist += .01f;
             timeKeeper = 0;
         }
 
         transform.position = Vector2.Lerp(transform.position, GameMaster.targetPosition, fracDist);
         transform.LookAt(GameMaster.targetPosition);
     }
 
     void OnTriggerEnter(Collider entity)
     {
         if(entity.gameObject.name == "Crosshair Red(Clone)")
         {
             Destroy(gameObject);
             Instantiate(boomObj, transform.position, boomObj.rotation);
         }
     }
 }

Thanks in advance

Note if I removed Transform.LookAt, then the missile spawns pointing up with no directional change.