Tortas Ahogadas date back to the early 1900's, and came about as a mistake. A customer wanted some extra salsa on the their torta, but the employee accidently dropped the whole sandwich in the salsa, 'drowning it'. The customer still ate it and said it was delicious!
Traditionally Tortas Ahogadas are made with birote salado. It's very similar to a sourdough baguette. I used a store-bought French baguette that you finish baking at home. This makes your house smell like a bakery!