Avoid recreation of programmatically created menuitem in fragment

Question

My question is how can I prevent that my programmatically created toolbar menuItem (Menu with submenus) gets overridden with the xml layout every time the fragment resumes. I want to create my expensive toolbar menuitem only when fragment is first time created and not when it is resumes.

I inflat my toolbar in the onCreateOptionsMenu() and store an instance of the menu item.

private MenuItem menuItem;

private SubMenu expessiveSubmenu;

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {

    inflater.inflate(R.menu.menu_layout, menu);
    menuItem= menu.findItem(R.id.menuItem);
}

The menuItem gets populated when the async loader finishs.

   @Override
    public void onLoadFinished(Loader<> loader, Data data) {
                 //Expensive call
          expensiveSubmenu= makeExpensiveSubMenu(menuItem, data);
}

Now the menu is fully populated and visible in the toolbar and I also have an instance of my submenu.

Because onCreateOptionsMenu() is called evertime the fragment is resumed my menu get's overridden with the xml layout and I have to create the expensive submenu again. A mehtod like menu.addSubmenu(Menu) would solve my needs but I couldn't find one. Any ideas would be appreciated.