Make your sandwich. Use sturdy bread that will hold together, but make sure that the slice will fit into the Sefama shell mold. Complete the sandwich with any ingredients you want included.
Turn on the burner or grill to a medium heat. Too high of a heat will burn the sandwich. The sandwich maker cooks slower on a lower heat and will not burn the sandwich.
Place the sandwich in the mold of the sandwich maker. Make sure that all sides fit in the mold and that the shell will be directly in the center of the top slice of bread.
Close the sandwich maker and clasp the hook to lock the sandwich in place.
Place the bottom of the sandwich maker on the oven burner or grill. The shell should be facing up. Leave on for five minutes or more depending on how much you want your sandwich cooked.
Check to see if your sandwich is done. Use an oven mitt to unclasp the hook and slowly pull the sandwich maker apart. If it's not done, clasp the hook and put the Sefama shell sandwich maker back on the heat source.