Peel and slice the potatoes into thin rounds.
Rinse the sliced potatoes in cold water to remove excess starch.
Drain and pat the potatoes dry with a clean towel.
In a large skillet, heat the vegetable oil over medium heat.
Add the sliced onions and sauté until translucent, about 5 minutes.
Increase heat to medium-high and add the sliced potatoes.
Season with salt and pepper, tossing to combine.
Cook for about 10-15 minutes, turning occasionally until golden brown.
Remove from heat and let drain on paper towels.
Garnish with fresh parsley before serving.