Just thinking back on Summerset, we got two very good recipes that utilized the two new alchemical ingredients from the Expansion.
Then Elsweyr rolled around and the 2 (later 3) alchemical ingredients had no use in cooking until the Witches Festival, which utilized Dragon's Blood in the new Bloody Mara recipe.
Greymoor also added 3 new alchemical ingredients, but no new recipes.
I get that we have so many top tier foods now that it would be hard to justify new stuff, but why not make more utilitarian foods, like the Artaeum Pickled Fish Bowl?
How about a Chaurus Egg Omelette that also had Crimson Nirnroot that gives a chance to get double drops from Bosses and/or Chests?
Or something with Vile Coagulant that helps vampires with their incendiary problems?
Stuff like that?