Ultimate Pastrami Sandwich

What else can I say except, Mmm, Mmm good!

• 3 T butter
• 1 onion, sliced
• salt and pepper
• ¾ c beer
• 6 pieces of pastrami
• 2 t worcestershire sauce
• 1 T spicy mustard
• 1 ½ c swiss cheese, shredded
• pumpernickel bread

Place 2 tablespoons butter in a large skillet over medium heat.   Add the onion and salt and pepper to taste. Cook for five minutes.   Stir in the beer and continue cooking, stirring occasionally for eight more minutes.  Remove from the heat and stir in worcestershire sauce and mustard.   Place the onion mixture to a small bowl and set aside.
 
Place the pastrami in the same skillet until just warmed through.   Remove from the heat and set aside.
 
Lightly butter the outsides of all four pieces of pumpernickel bread. On two of the unbuttered sides, divide half of the cheese.   Place equal amounts of hot pastrami and onions on top of the cheese. Sprinkle with the remaining cheese and then place unbuttered sides of bread on top of the cheese.
 
Melt the remaining one tablespoon butter in a large skillet over medium heat.   Place the sandwiches to the skillet and cook until the bread is toasted and the cheese melts, about four minutes per side.  Enjoy!