Frittata Sandwich with Potatoes, Olives and Peppers

Frittata Sandwich with Potatoes, Olives and Peppers

Why aren’t there more potato sandwiches in this world? I’ve read Elvis Presley was rather fond of a sandwich piled high with fried bacon, onions, and potatoes. He smeared it with yellow mustard and served it on soft white bread. There’s no arguing that’s one heck of a potato sandwich, but it doesn’t sound like something I’d eat. In Indian cuisine curried potatoes find themselves tucked or rolled into sandwiches. But here North America potatoes are usually considered a side dish. Well I’ve decided to move potatoes, if not to the center of the plate, then at least to the center of a bun. I’ve made a potato frittata sandwich and served it on a ciabatta roll with baby kale and homemade garlic-caper mayo. That’s the whole enchilada. Well, I mean frittata.

Let’s start with the potatoes. I called this a potato frittata sandwich because I couldn’t resist putting the words frittata and ciabatta on the same plate. However the potato filling in my frittata sandwich is closer to a Spanish potato tortilla than it is to an Italian frittata. The Italian version tends to be puffy and custardy. It’s often stuffed full of whatever eats you have hanging out in the refrigerator. However, a Spanish tortilla is much more simple. It rarely uses more than 3 or 4 ingredients. It has a more solid texture too – with just enough cream and egg to bind the potatoes together. It’s a combination that snuggles nicely between two pieces of bread.

Potato Frittata Sandwich

So I turned a Spanish-style tortilla into a sandwich stuffer. After all, I like sandwiches. I like them for their portable appeal. I like them even more for their nostalgic appeal. I probably had a sandwich a day from age 6 to 17 because sandwiches reigned supreme in my grade school lunch pail. However, what I most admire about the humble sandwich is its nearly unlimited potential. All you need is two slices of bread and your imagination (and in this case potatoes). GREG

Frittata with Potatoes, Olives and PeppersGarlic Caper MayoFrittata Sandwich with Potatoes, Olives and Peppers

Frittata Ciabatta Sandwich with Potatoes, Olives and Peppers 

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The peppers and the frittata can be made up to two days ahead of time. Store, covered in the refrigerator. Toast the ciabatta just before assembling the sandwiches.

Frittata Ciabatta Sandwich


  • 1 egg yolk (at room temperature)
  • 1 clove garlic (peeled and minced)
  • 1 tablespoon freshly squeezed lemon juice
  • 3/4 cup plus 2 tablespoons extra-virgin olive oil (divided, plus more for tasting ciabatta))
  • 2 tablespoon chopped capers (drained and rinsed)
  • ½ pound sweet peppers (seeded and cut into strips)
  • 1 teaspoon kosher salt (divided, plus more as needed for seasoning)
  • freshly cracked black pepper (as needed)
  • 6 large eggs (at room temperature )
  • 2 tablespoon whole milk (or cream)
  • 1 large, Idaho russet potato (peeled and cut into ½‑inch dice)
  • ½ large onion (peeled and roughly chopped)
  • 2 ciabatta rolls
  • baby kale (as needed)


Make the garlic-caper mayonnaise: Place egg yolk, garlic, and lemon juice in a blender or mini-food processor. With the machine running slowly add ½‑cup oil in a thin stream until thick and well emulsified. Scrape the mayonnaise into a small bowl or jar. Stir in the capers. Cover and refrigerate up to 4 days.

Make the sautéed sweet peppers: Heat 2 tablespoons oil in a large nonstick skillet set over medium heat. Add sweet peppers; season with salt and pepper. Cook, stirring occasionally, until peppers are just tender, about 10 minutes. 

Scrape the sweet peppers onto a plate to cool. They can be made up to two days in advance. Cover and refrigerate until ready to use. Bring to room temperature before use.

Make the frittata: In a medium bowl combine eggs and milk (or cream); season generously with salt and pepper. Beat lightly until blended. Set aside.

In a medium saucepan, cover the potatoes with water by about 1‑inch; season generously with salt. Bring to a boil, then lower the heat to a simmer. Cook until tender, about 10 minutes. Drain and set aside.

Preheat the oven to 350 degrees Fahrenheit.

Stir the the olives to the egg mixture; set aside.

Heat remaining ¼‑cup oil in a 10-inch cast iron or other nonstick ovenproof skillet set over medium heat. Add onions; cook, stirring often, until soft and just beginning to color, about 8 minutes. Add the potatoes to the skillet, gently spread them evenly across the bottom.

Increase the heat to medium-high. Pour the egg and olive mixture over the onions and potatoes, gently shaking the pan to evenly distribute mixture. Cook the frittata, without stirring, until its edges begin to set, about 3 minutes. Transfer skillet to oven. Bake frittata until golden brown and center is set, 25–30 minutes. 

Once cooked, cool frittata a few minutes then slide or flip it onto a cutting board. Cool completely, then cut into two rectangular slabs, sized to fit the ciabatta rolls. Save scraps as a snack.

Assemble the sandwiches: Split the ciabatta rolls in half and remove a little of the inside crumb creating a shallow well in the center of each of the top halves. Arrange tops and bottoms, cut side up, in a single layer on a rimmed baking sheet. Brush the top surface of each ciabatta lightly with olive oil. Place baking sheet into heated oven. Bake until bread is lightly golden on the edges; about 12 minutes. Take baking sheet out of the oven and let ciabatta cool slightly before assembling sandwich.

When ready to serve, spread both interior sides of each ciabatta roll with some garlic-caper mayo. Top the bottom halves with a generous helping of sautéed sweet peppers and place a frittata slab on top of each. Generously fill the indentations of the top rolls with baby kale. Put the sandwiches together, cut in half and serve within a couple of hours.

Frittata Sandwich with Potatoes, Olives and Peppers.