Spanish Tortilla

Name: Spanish Tortilla
Prep time: 30 min
Cook time: 45 min
Total time: 1 h 15 min
Cuisine: European, Mediterranean, Spanish
Ingredients: 1 cup extra-virgin olive oil; 4 medium red potatoes, thinly sliced; 1 large yellow onion, halved, thinly sliced; 2 teaspoons kosher salt, divided; 1 1/2 teaspoons black pepper, divided; 8 eggs; 2 tablespoons coarsely chopped parsley; 12 slices prosciutto