Spanish Tortilla Cake Recipe | Food Network

Ingredients

• 3 tablespoons olive oil
• 1 large onion, thinly sliced
• 1 tablespoon minced fresh rosemary leaves, or 1 teaspoon dried rosemary, crumbled
• 11/2 teaspoons minced fresh thyme leaves, or 1/2 teaspoon dried thyme, crumbled
• Salt and freshly ground black pepper, to taste
• 6 large eggs
• 4 egg whites
• 2 pounds (about 3 large) potatoes, boiled, peeled and sliced