Usually it's 'sandwich' (plural - les sandwichs) but a ham sandwich is also called 'un jambon beurre'.
It is masculin "Un sandwich". Most foreign (to France) words are masculin :Un short, un parking, le shopping, le shampooing....
Masculine.
Sandwich in English = Sandwich in French
A ham sandwich is "un sandwich au jambon" in French.
A wholegrain bread sandwich is 'un sandwich au pain complet' in French.
Un sandwich.
There is no specific French word for sandwich, so it is spelled the same.
In French, "sandwich" is a masculine noun. So you would use "un sandwich" for "a sandwich."
A lettuce sandwich is "un sandwich à la laitue" in French. You would rather ask for "un sandwich à la salade".
sandwich pronoused saandwish
sandwich de héros
sandwich de saucisse
The word for grilled in french is grillé. Pain grillé is toast. Un sandwich grillé would be a grilled sandwich.
sandwich au poisson