You could always give the cooking pot an inventory and a 'cook' ability. Whenever the cook ability is used, it takes what is in it's inventory and makes an item with it if possible.
Also, work on your sentance structures, both of you:
I can trigger, however I am unsure of what system to use.
My Idea is that you can build a "Cooking Pot" and you obtain ingredients to cook.
I have tried some systems but they weren't any good. Any ideas?
Solutions will be rewarded with REP.
AND
Have you tried this?
AND
Well, I'll try
Sorry, just a habit. I find good sentence structure and grammar allows your posts to gain increased accesibility and have a greater chance of replies.