Preheat the oven to 400 degrees. Line baking sheet with parchment paper. Cut slits two-thirds down into each potato and ¼ inch apart.
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Transfer sliced potatoes onto the baking sheet. Brush the sliced tops with the garlic butter mixture. Season with salt & pepper.
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Bake potatoes for 20 minutes. Remove from the oven. Baste again with garlic butter. Bake for an another 10 to 15 minutes, until the potatoes are crispy & brown. Baste before serving with sauce.
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