These Pastrami-And-Mushroom Hot Dogs are a delicious twist on a classic favorite. The hot dogs are topped with sautéed mushrooms and onions, then smothered in melted Swiss cheese and tangy mustard. The pastrami adds a savory and smoky flavor that pairs perfectly with the juicy hot dog. This recipe is quick and easy to make, and is sure to be a hit at your next cookout or game day gathering.