- Pre-heat oven to 375F.
- Heat two tablespoons olive oil over medium heat in an 8" ovenproof skillet (preferably non-stick). Add sliced potato and season generously with salt and pepper. Cook potatoes, turning gently, until softened but not browned, approximately 20 minutes. Remove from pan and reserve.
- Add remaining oil and onion. Cook, stirring occasionally, until soft, approximately 10 minutes. Add garlic to onions and cook 2-3 minutes, until softened and aromatic. Return potatoes to skillet, gently stir to combine, and cook an additional 5 minutes.
- Reduce heat to low. Beat eggs with the parsley. Pour eggs into skillet over vegetables and shake the pan to evenly distribute the eggs. Cook, without stirring, for 5 minutes. Transfer to oven and cook 10 minutes, or until egg is set.
- Cool to room temperature. Remove from pan and cut into 12 thin wedges or squares.