I went and bought one after reading some good reviews. The recipe is a lot like my "neatloaf" recipe:
http://www.ellenskitchen.com/recipebox/meatloaf2.html

Only mine has a little more texture. To get closer to the Annies loaf, reduce the cooked rice to 1/2 cup (or omit the cooked rice) and add:

1/2 cup cooked butter beans, mashed,
PLUS 1/2 cup very finely shredded celery

The gravy is a soymilk base with dried mushrrom powder and just a spoonful of tomato paste. thickened with rice flour.