I just finished indexing my first book. As others have said here, it was very interesting -- frustrating at times, but interesting.
I have a couple of questions about classifying recipes. The first is about ethnicities. My book was all stir-fries, so the recipes were nominally Asian. I classified them as Asian under ethnicities, but working from the ingredients (e.g., kaffir lime leaves) and my modest experience with Asian cooking, it would have been possible assign a more specific ethnicity to perhaps ¾ of them. Based on my interpretation of the instructions, I decided not to guess, and so provided a more specific ethnicity only in the case of recipes that included one in the title (pad Thai) or were in the examples (chow mein). Was this right?
The second question is similar -- how conservative should we be in classifying recipes as vegan or vegetarian? As an example, in a section of my book labeled “Vegetables” (not “vegetarian”) there is a recipe for “tofu pad Thai” that does not include the usual pad Thai ingredients of fish sauce, eggs, and shrimp in one form or another. It does, however, include “pad Thai sauce.” Based on a superficial internet search, pad Thai sauce seems to usually have shrimp and/or fish sauce in it, so I did not classify it as vegetarian. Based on the example of treating cheese as vegetarian, discussed in posts above, should I have labeled it vegetarian on the assumption that vegetarians could be careful to buy only vegetarian pad Thai sauce, assuming there is such a thing? There were several other recipes that called for prepared sauces (char siu sauce, “Cantonese sauce”) to which the same question applies.
I agree that the store-cupboard ingredients list should recognize that brown onions are the same as yellow onions.