Leberkäse Sandwich

Caramelize the Onions

• Melt 1 tablespoon of butter in a large skillet over medium-low heat.
• Add the sliced onions and a pinch of salt. Cook slowly, stirring occasionally, for 10-12 minutes until they are soft, sweet, and deeply golden brown.
• Once caramelized, remove the onions from the skillet and set them aside.

Fry the Leberkäse

• Wipe the skillet clean if necessary and place it over medium-high heat.
• Add the Leberkäse slices to the hot pan. You do not need to add more oil as it will release its own fat.
• Fry for 3-4 minutes per side, until a rich, brown crust forms and the slices are heated through. Remove from the pan and keep warm.

Fry the Eggs

• In a separate non-stick skillet, melt the remaining 1 tablespoon of butter over medium heat.
• Carefully crack the eggs into the pan. Season with the remaining salt and black pepper.
• Cook for 2-3 minutes for a sunny-side up style, until the whites are fully set but the yolks are still runny. Cook longer for a firmer yolk if desired.

Assemble the Sandwich

• Optional: Lightly toast the cut sides of the Kaiser rolls in the warm skillet for 1 minute.
• Spread a generous tablespoon of sweet German mustard on the bottom half of each roll.
• Place a hot slice of fried Leberkäse on top of the mustard.
• Add a heaping portion of the caramelized onions over the Leberkäse.
• Carefully top with a fried egg.
• Place the top half of the roll on, press down gently, and serve immediately.