We can say ‘fried fish’, ‘baked potato’ or ‘minced pork’ using past participles for modifiers. However, ‘roast’ is different - either ‘roast duck’ or ‘roasted duck’ works, it seems to me. How should we analyze this? Is ‘roast’ a noun modifying a noun here, or is it a different form of the past participle? (According to freedictionary.com, in Middle English the past participle was ‘roste’ – does that mean that this was once a strong verb?) Answer Inconsistent treatment of "roast" and "roasted" goes back many years. In Mrs. Frazer, The Practice of Cookery, Pastry, Pickling, Preserving, &c (1791), the author's names for the roasts listed in a four-page "Bill of Fare" section (comprising suggested dinners of from five to seventeen dishes each) are inconsistent. Here is how Mrs. Frazer identifies the roasts mentioned in her menus: "Roast of Beef," "Roast Mutton," "Roasted Fowls," "Roasted Hare," "Roasted Du...