I don't know about the rest of you, but for me Provisioning has been a royal pain in the... bank. I was never sure which ingredients were used for which recipes at which tier. Then I found the Sous Chef addon! Even though I can't use some of the recipes I've found so far (my recipe quality is only up to tier 3) I can see which tier each ingredient belongs to (1-6) and which ones I haven't found a use for at all as of yet! As a bonus, it also shows a big checkmark next to recipes that I don't have (very valuable when browsing the guild bank) and if I click on the ingredient it will show me the recipes that use that ingredient!
Inspired somewhat, by ingeniousclown's Research Assistant, Sous Chef will make your provisioning life somewhat easier, by keeping track of things so you don't have to.
Sous Chef will work through your cookbook, and then whenever you look at your inventory or bank, will mark Provisioning Ingredients with the Provisioning Rank of any matching recipes that you know (I, II, III, IV, V, VI). If you click on the ingredient, Sous Chef will let you know which recipes use that ingredient.
She will also take note when you browse recipes, of any that you don't know, in your inventory, bank, guild bank and guild store, and mark them for your later elucidation. Let it not be said that your Sous Chef doesn't look out for you!
If you set Alternate Character Check on and have the Mark if recipes are unknown, then the tickmarks marking unknown recipes will be faded if an alternate character knows that recipe. Clicking once on the recipe will detail who knows that one.
Alternate Character Knowledge will spread the information of your culinary knowledge to all your bank alts.
Now the only problem that remains is hoarding ingredients on the off chance that you'll find the recipe for it in the future =)
(also compatible with ingeniousclown's Inventory Grid View addon)