My polite inquiry to the publisher was not answered, so I was forced to be a bit more assertive on this matter. The first thing I did was spend the $20 to get an ebook copy of the text. I then went through the recipes one by one looking for those that looked familiar.
Of the recipes that Breverton included,
at least 19 were taken directly from my website. In some places the occasional word was changed, but my (admittedly strange at times) wording is still clear. For those playing at home, here is a list of those recipes with the ebook location and a link to the version on MedievalCookery.com:
Rapes in Potage - Baldrick's Turnip Broth (Location 1723)
http://medievalcookery.com/recipes/pottage.html
To Bake a Gammon of Bacon (Location 1871)
http://medievalcookery.com/recipes/bacon.html
Mawmeny - Chicken Stew (Location 1984)
http://medievalcookery.com/recipes/mawmeny.html
Capon Stue - Chicken Stew (Location 2339)
http://medievalcookery.com/recipes/caponstew.html
Meat Pyes (Location 2363)
http://medievalcookery.com/recipes/pyes.html
Pygge Y-Farsed - Stuffed Piglet, Goat, or Sheep (Location 2658)
http://medievalcookery.com/recipes/piglet.html
A Dishe of Artechokes (Location 3197)
http://medievalcookery.com/recipes/artechokes.html
Divers Sallets Boyled - Sweet-Cooked Salad (Location 3221)
http://medievalcookery.com/recipes/diuers.html
Compost (Location 3245)
http://medievalcookery.com/recipes/compost.html
A Tart of Ryce - Rice Pudding Pie (Location 3909)
http://medievalcookery.com/recipes/ricetart.html
Tostee - Ginger Syrup Toasties (Location 3955)
http://medievalcookery.com/recipes/tostee.html
A Dysschefull of Snowe - Strawberries on Snow (Location 4071)
http://medievalcookery.com/recipes/strawberries.html
Peach Tarte - Any Fruit Pie (Location 4438)
http://medievalcookery.com/recipes/peachtart.html
Gyngerbrede - Honey Ginger Bites (Location 4572)
http://medievalcookery.com/recipes/gyngerbrede.html
Cruste Rolle - Henry VIII's Crackers (Location 5584)
http://medievalcookery.com/recipes/crusterolle.html
Poudre Douce - Sweet Powder Two Ways [second version] (Location 5709)
http://medievalcookery.com/recipes/douce.html
Poudre Fine - Fine Powder (Location 5730)
http://medievalcookery.com/recipes/fine.html
Sobre Sawce - A Sauce for Freshwater Fish (Location 6095)
http://medievalcookery.com/recipes/sobre.html
Buttered Beere Another Way (Location 6986)
http://medievalcookery.com/recipes/butterbeer.html
In addition to those, I have found four more that were taken from Kristen Wright's website (Greneboke.com):
To Bake a Mallard - Duck in Tudor Sauce Pie (Location 3044)
http://greneboke.com/recipes/bakedmallard.shtml
Buttered Wortes - Buttered Cabbage and Leeks on Bread or Toast (Location 3336)
http://greneboke.com/recipes/wortes.shtml
Tart of Prunes - Damson Pie (Location 4001)
http://www.greneboke.com/recipes/prunetart.shtml
Leach of Almonds - Almond Pudding (Location 4185)
http://www.greneboke.com/recipes/almondpudding.shtml
Nasty-grams have been sent out, so I expect the ebook version to be dropped within the next day or so. We'll see if / how the publisher responds.
Here's the real irony: Breverton listed MedievalCookery.com among the "Useful Websites" ...
... of course he doesn't say it's one of the ones "Of particular excellence and endeavour". Maybe he only steals from sites he's not impressed with. If so then the folks lower down on the list might be concerned too.
I'll post more if / when things progress.