Soft-Boiled Egg, Prosciutto and Arugula on Panini Roll
A simple yet elegant Italian breakfast sandwich featuring a jammy soft-boiled egg, salty prosciutto, and peppery arugula on a warm panini roll. The runny yolk creates a natural sauce that brings everything together. Perfect for a quick weekday breakfast or leisurely weekend brunch.
Steps
Before you start
- Bring a small pot of water to a boil
- Gather all ingredients so assembly is quick while eggs are still warm
- Have a bowl of ice water ready to stop the cooking
Boil the eggs
- Fill a small saucepan with about 2 cups (480 ml) of water and bring to a rolling boil over high heat.
- Gently lower the room-temperature eggs into the boiling water using a spoon.
- Set a timer for 6 minutes for a soft yolk that's runny in the center with just a thin cooked layer around it.
- If you prefer a slightly firmer yolk, cook for 7 minutes.
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Ready when: White is opaque and set; yolk is warm and mostly liquid
Tip: Start timing only after the water returns to a boil, not from when you add the eggs.
Ice bath the eggs
- Using a slotted spoon, immediately transfer the eggs to a bowl of ice water to stop the cooking process.
- Let them sit for 1 minute, then gently tap and roll them under your hand to crack the shell all over.
- Peel under cool running water, starting from the wide end where the air pocket sits, and set aside on paper towels.
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Ready when: Shell is completely removed and egg is cool enough to hold
Tip: Peeling under running water helps separate the membrane from the white, making peeling easier.
Toast the rolls
- While the eggs cool, split the panini rolls in half and toast them cut-side down in a dry skillet over medium heat for 2–3 minutes, until lightly golden and warmed through.
- Do not oil the pan; the rolls have enough fat in the dough.
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Ready when: Rolls are light golden and warm inside
Tip: Toast the rolls just before serving so they stay warm and crispy when you assemble.
Assemble the sandwiches
- Spread a thin layer of mayonnaise on the inside of each toasted roll (or omit if you prefer to let the yolk be the main sauce).
- Layer on 3–4 slices of prosciutto per sandwich, then a handful of fresh arugula.
- Gently place one warm soft-boiled egg on top of the arugula on each roll.
- Sprinkle the yolk with a pinch of sea salt and fresh black pepper.
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Ready when: Egg is nestled on arugula and all components are in place
Tip: Leave the egg whole on top so the yolk runs when you bite into the sandwich—that's the magic.
Add finishing touches
- If using lemon juice, squeeze a tiny amount over the arugula (about 1/4 teaspoon per sandwich) to brighten the peppery greens and add acidity that complements the rich egg and salty prosciutto.
- Grind a small amount of black pepper over the top.
- Close the sandwich if desired, or eat it open-faced.
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Ready when: Sandwich is seasoned and ready to eat
Tip: Keep it open-faced if serving on a plate; it's easier to eat and showcases the beautiful runny yolk.
Good to know
Tips
- The magic of this sandwich is the soft, runny yolk acting as a sauce—avoid overcooking the eggs or you'll lose that creamy texture.
- Use prosciutto di Parma if you can find it; the quality of the cured meat really matters in such a simple sandwich.
- Toast the rolls right before assembly so they're still warm and crispy; cold rolls make the sandwich less appealing.
- For a caramelized crunch, lightly butter the outside of the toasted roll and press it cut-side down in a hot skillet for 30 seconds after toasting the insides.
Storage & reheating
Best enjoyed immediately while warm. Leftover peeled soft-boiled eggs can be refrigerated in a covered container for up to 3 days and eaten cold or reheated gently in warm water, but assembled sandwiches do not keep well.
Substitutions
- panini rolls → ciabatta rolls, focaccia, or sourdough bread. Any crusty Italian-style bread works; toast to keep the texture distinct from the soft egg.
- prosciutto, thinly sliced → speck, pancetta (thinly sliced), or smoked ham. Choose thinly sliced cured meats with similar salty, savory flavor.
- fresh arugula → watercress, peppery mesclun greens, or baby spinach. Look for peppery or slightly bitter greens; spinach is milder but also works well.
- mayonnaise → softened butter or olive oil. If omitting mayo, a small drizzle of good olive oil on the bread adds richness.
