FOR 12 CONSECUTIVE YEARS, I have watched American Thanksgiving roll by on my calendar but I haven't been near an American dinner table for the occasion. I pretend to observe the occasion by locating an Irish carvery serving turkey and dressing on the day but sometimes that's difficult. So today, it's a turkey breast sandwich with avocado served on Pat the Baker white bread. Somehow, that combination feels like it will take the pain out of missing this traditional American holiday.