The context of the following conversation is Jesse selected the thing that was best for you even tho Jesse knew you hated spinach with a passion.:
Jesse says I am going to bring a spinach dish for the potluck..
The friend responds I hate spinach..
Jesse responds It's so good for you though.  It's packed with vitamins..
The friend responds I've heard all that from my mom and doctor.  They are both trying to get me to eat more vegetables..
Jesse responds Add me to that list.  You need to eat more vegetables.  You eat nothing but hotdogs and buns and ketchup..
The friend responds Ketchup counts as a vegetable, right?  It's made from tomatoes..