Peel and slice the potatoes into even wedges.
Thinly slice the onions and set them aside.
Heat olive oil or butter in a large skillet over medium heat.
Once hot, add the sliced potatoes and cook for about 5 minutes without stirring.
Stir the potatoes gently, allowing them to brown on one side.
Add the sliced onions to the skillet with the potatoes.
Season with salt and pepper to taste.
Continue to cook, stirring occasionally, for another 15-20 minutes.
Ensure the potatoes are golden brown and the onions are caramelized.
Remove from heat and garnish with fresh herbs if desired.