Cheesy Hasselback Potato Au Gratin

Bahan-bahan (6 porsi)

• 3 pounds baby potatoes, I like using a medium size
• 2 tablespoons extra virgin olive oil
• 2 cups heavy cream or whole milk
• 2 cloves garlic, minced or grated
• 1/2 cup grated manchego cheese
• 1/2 cup grated gruyere cheese
• 1 tablespoon chopped fresh thyme
• 2 tablespoons butter, thinly sliced
• kosher salt and pepper