Peel the potatoes and slice them into thin rounds, about 5-10 mm thick.

Heat the butter and oil in a large pan or skillet over low heat.

Add the sliced potatoes to the pan in a single layer.

Cook the potatoes slowly over low heat until they are cooked through and golden brown, flipping occasionally.

This can take 30 minutes to 1 hour depending on the type of potato used.

Ensure potatoes are cooked on a low heat for an even golden brown color and to prevent burning.

Once the potatoes are cooked through, add the salt, pepper, and parsley.

Mix well to combine and coat the potatoes evenly with the seasonings.

Transfer the fried potatoes to a heated serving dish.

Serve immediately with additional parsley for garnish, if desired.