LINQ2SQL Stack overflow

I am getting a stack overflow with the following code. I know what the problem is, that it executes all "GetAllPages" in the

           Children = new LazyList<Page>(from p in GetAllPages(language)
                                          where p.ParentPage == s.Id
                                          select p)
 

before it adds the p.ParentPage == s.Id

private IQueryable<Page> GetAllPages(string language)
 {
     return from s in context.Pages
            where (from c in GetAllContent()
                   where c.PageId == s.Id &&
                         c.Language.ToLower() == language.ToLower()
                   select c).Any()
 
            let contents = (from c in GetAllContent()
                            where c.PageId == s.Id
                            select c)
            select new Page()
            {
                Id = s.Id,
                SiteId = s.SiteId,
                Type = s.Type,
                Template = s.Template,
                ParentPage = s.ParentPage,
                Visible = s.Visible,
                Order = s.Order,
 
                Contents = contents.ToList(),
                Children = new LazyList<Page>(from p in GetAllPages(language)
                                              where p.ParentPage == s.Id
                                              select p)
            };
 }
 

How can i do this, correctly?

UPDATE:
The reason behind the code is that, i have a tree structured menu, where one menu item can have 0 to many child items.
The language part can be skipped, but my site support multiple languages, and with the language parameters do i only want menu items there have a content of the given language.

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