Liverwurst (or Braunschwieger) with peanut butter on pumpernickle.
About 6 or 7 years ago, Papa Johns was slipping little packets of Cholula garlic hot sauce in the boxes with the pizzas. Utterly delicious and I use it with pizza to this day..alas, it was just a limited promotion for Papa Johns, but I keep a bottle of the sauce at home for pizzas and everything else for that matter.
Open-Faced Liverwurst Sandwich