For me, I've always gone by the typical english definition of "combining and heating" ingredients.
If you've combined more than one item together and applied heat somehow, that counts as cooking, otherwise you're doing something else. Like, if I made myself a cold sandwich, I wouldn't say I 'cooked' a sandwich and the same for if I threw a burrito in the microwave.
So, from that, as long as you either warmed up the beans or threw the bread in the toaster and those items weren't pre-combined somehow, I'd personally say you cooked it.
I feel like banning all direct links gets you 90% of the way there. No referral codes, if a user wants to find your site, they have to go looking, automated spam is harder, etc.