TdeV, in the meantime, you can find a good number of results in a Recipes search by entering the name of the appliance/cooking method into the search box, since many recipe titles will include the words "sous vide", slow cooker", "tagine", "pressure cooker", etc. Moreover, even if those words don't appear in the recipe title, the search will also find recipes with those words in the book title, which will appear at the end of the search results. Here are a few sample method/appliance searches in the EYB Library/Recipes:
You can then use the Filter By sidebar to narrow down the search results for any other categories you wish to include or exclude: Recipe Types, Ingredients, Occasions, Nutrition, or Ethnicity.