Aha! This is one of the salads we eat most often here in Venezuela. The recipe is exactly as you described it, except it's done with normal olive oil and normal vinegar, and then most of the time dressed with a mustard-based sauce with a bit of pepper, vinegar and other things.
I didn't start eating salad until I was probably 20 years old. Growing up it's not really a common to serve on our table
Mostly rice and vials