Francesinha is a Portuguese sandwich, originally from Porto, made with layers of toasted bread and assorted hot meats such as roast, steak, wet-cured ham, linguiça, or chipolata over which sliced cheese is melted by the ladling of a near-boiling tomato-and-beer sauce called molho de francesinha.
I've eaten it and the toast soaking the sauce up always happened. It's actually part of the appeal as the sauce is magic and each restaurant makes them a bit differently.