You need 1 ingredient. The key ingredients include: ["1 1/2 cups extra-virgin olive oil", "2 pounds large Yukon Gold potatoes, peeled, quartered, cut into 1/4"" slices", "1 onion, quartered, thinly sliced", "2 1/2 teaspoons", "1 1/2 cups extra-virgin olive oil", "2 pounds large Yukon Gold potatoes, peeled, quartered, cut into 1/4"" slices", "1 onion, quartered, thinly sliced", "2 1/2 teaspoons kosher salt", "8 large eggs, beaten to blend", "1 1/2 cups extra-virgin olive oil", "2 pounds large Yukon Gold potatoes, peeled, quartered, cut into 1/4"" slices", "1 onion, quartered, thinly sliced", "2 1/2 teaspoons kosher salt", "8 large eggs, beaten to blend", "1 1/2 cups extra-virgin olive oil", "2 pounds large Yukon Gold potatoes, peeled, quartered, cut into 1/4"" slices", "1 onion, quartered, thinly sliced", "2 1/2 teaspoons kosher salt", "8 large eggs, beaten to blend", "1 1/2 cups extra-virgin olive oil", "2 pounds large Yukon Gold potatoes, peeled, quartered, cut into 1/4"" slices", "1 onion, quartered, thinly sliced", "2 1/2 teaspoons kosher salt", "8 large eggs, beaten to blend", "1 1/2 cups extra-virgin olive oil", "2 pounds large Yukon Gold potatoes, peeled, quartered, cut into 1/4"" slices", "1 onion, quartered, thinly sliced", "2 1/2 teaspoons kosher salt", "8 large eggs, beaten to blend", "1 1/2 cups extra-virgin olive oil", "2 pounds large Yukon Gold potatoes, peeled, quartered, cut into 1/4"" slices", "1 onion, quartered, thinly sliced", "2 1/2 teaspoons kosher salt", "8 large eggs, beaten to blend", "1 1/2 cups extra-virgin olive oil", "2 pounds large Yukon Gold potatoes, peeled, quartered, cut into 1/4"" slices", "1 onion, quartered, thinly sliced", "2 1/2 teaspoons kosher salt", "8 large eggs, beaten to blend", "1 1/2 cups extra-virgin olive oil", "2 pounds large Yukon Gold potatoes, peeled, quartered, cut into 1/4"" slices", "1 onion, quartered, thinly sliced", "2 1/2 teaspoons kosher salt", "8 large eggs, beaten to blend", "1 1/2 cups extra-virgin olive oil", "2 pounds large"].