From the American online magazine Vegetarian Times – a guide to what ingredients you could use to substitute in a recipe.
“…The next time you want to substitute an ingredient in a recipe, don’t panic. The originator of the recipe will never know! When you substitute, you improvise, you create, and you are the artist in charge.
Use the chart below as a starting point for brainstorming alternatives. The process might look a bit intimidating but is easy once you dive in and start asking questions such as: What do I really want this dish to taste like? What textures do I like? Why did the recipe writer put all of these things in here, anyway…?“
A couple of those charts from the site: Covering meat free and vegan ingredients »
The full article has more tables covering low fat, allergy and yeast free ingredients:
http://www.vegetariantimes.com/section_display.cfm?section_id=95