Start by washing and peeling the potatoes. Dice them into uniform cubes, roughly 1-inch pieces, and soak in water for 15-20 minutes. Drain and pat dry.

In a large skillet, combine olive oil and butter over medium-high heat. Warm until the oil shimmers and the butter melts, about 2-3 minutes.

Carefully add the prepared potatoes in a single layer and cook for 15-20 minutes, stirring occasionally for even browning.

During the last 2-3 minutes, sprinkle with salt, pepper, and any additional herbs or spices. Stir well to coat the potatoes.

Remove from heat, let rest for a minute, and garnish with fresh herbs if desired. Serve hot.