Potatoes Au Gratin: Creamy Cast Iron Skillet Recipe

Ingredients

• 1 cup heavy cream
• 1 teaspoon oil
• 2 sprigs fresh thyme (1 for garnish)
• 1 clove garlic, minced
• 4-5 large white potatoes, peeled and cut into 1/8 inch slices
• 1 teaspoon salt
• 1½ cup grated gruyere cheese
• 2 tbsp butter, plus extra for greasing skillet