I believe you are referring to “Guantanamera,” a Cuban song. A Guantanamera is a young woman from Guantnamo province in the far east of that island. It’s “Guantanamera, guajira, Guantanamera....” A guajira is a peasant. One of my good friends when I was stationed there also sang “one ton tomato” until we set him straight.
I’ve also heard it parodied as “One-ton Camaro” LOL
One ton tomata, she was a one ton tomata, one ton to-ma-ta, she was a one ton to-ma-ta.
And it makes me happy.
Sorta like the Too Fat Polka.