ravioles I like...

So in another cross language ding-up, I made a brain mistake. Last night, I was hungry, and wanted to order some ravioles from the local fresh ravioles store that's 4 stores away from our apartment.
First point: it's cool that there are ravioles stores around these parts.
Browsing the list, I saw things I recognized, like:

"ricotta y albahaca" ricotta cheese and basil
"tres quesos" three cheeses
"calabaza" squash
"ricotta y nuez" ricotta cheese and walnuts

and one I didn't get completely "seso y espinaca" I knew spinach and something...

more background spanish knowledge floating around in my head: "sesamo" means sesame seeds "lino" means flax seed

so browsing the menu, i'm beginning to think this place is pretty fancy and sophisticated, because they sell squash ravioles and ricotta and basil ravioles, and they're a ravioles store for Pete's sake!! I get on the phone, decide to go with some squash ravioles and the "seso y espinaca" ravioles, because I'm thinking this is spinach with some seed mixed together. Well, they're out of squash ravioles, but no problem on the "seso y espinaca" ravioles. The guy brings them right over in like 3 minutes.
Point #2 Businesses in Argentina deliver anything, even your laundry, so when you're 4 stores away, it doesn't take long.

So I'm excited, and my mouth is watering now that I have the water boiling and I plop in the "seso y espinaca" ravioles to cook. I ask my roommate if he wants some, but he passes on the offer. So when they're done, I eat these ravioles, and they're really, really good, telling my roommate he's an idiot for passing on such great tasting ravioles!! Then I say, "I really need to see what "seso" means, it tasted so good!" So I pull out the Spanish/English translator, and after my roommate shows me how to use it (who's the idiot now), I look up "seso".

seso = cow brains

yep, cow brains and spinach. ravioles.
Point #3 I'm not sure if "seso" is good nourishment for my thoughts.