Guild Wars 2

With the inevitable cap raise, I can think of three ingredients that could provide a TON of dishes to get us from 400 to 500.

Honey
Harvested from trees the same way cinnamon and walnuts are, honey would allow us to make everything from glazed meat dishes to honey covered pastries.

Slabs of Pork
Dropped from boars, pinapals, simioths, etc, this would let us make pork dishes, sandwiches, and bacon-wrapped [insert just about anything here].

Fish & Shellfish
Ideally introduced via fishing, fish and shellfish would let use make all sorts of seafood dishes, and we could finally put all that seaweed to use and start making sushi.

Personally, I’d rather raise cooking from 400 to 500 making ham sandwiches, bacon-wrapped steak, honey glazed poultry dishes, steamed crab legs, tuna sushi rolls, and honey cakes than grinding out more Bloodstone Bricks and Dragonite Ore (or whatever the cooking equivalent is going to be).