> Originally, "tartine" means a slice of bread, toasted or not, with something spread on it, usually eaten for breakfast : butter (tartine beurrée), jam (tartine de confiture), cheese (tartine de fromage)...

That was exactly my point as I mentioned on my 2nd post "Tartine = Butter/Jam spread on bread is the original use of the word but there may be a new use of it." Calling a open sandiwich tartine seem relatively new. Oh, that makes me feel too old.

Cigalechanta,
Your recipe sounds very much like what I ate in Arles last fall. I'm going by the market and get the ingredients today!! Thanks