Fried green tomatoes are sliced green tomatoes that are coated in batter and deep fried. They sound like they woudn't taste very good, but they actually do taste good and they're fun to eat... especially with ketchup. Down here in the deep south of the US (where this dish originates, if I'm not mistaken), they'll batter and fry just about anything (except for the "sweet tea"). I've even had battered and fried dill pickles at a catfish eatery in Opelika, Alabama.