Sweet Potato Gratin

This sweet potato gratin recipe is layered with Gruyère cheese and a cream-based sauce flavored with four fresh herbs — parsley, sage, rosemary, and thyme.

• Preparation Time: 25 mins
• Cooking Time: 35 mins
• Total Time: 60 mins
• Calories: 391 Calories

Ingredients

• 2 cups heavy cream
• 2 cloves garlic, minced
• cooking spray
• 1 tablespoon minced fresh rosemary, or more to taste
• 1 tablespoon chopped fresh parsley, or more to taste
• 1 tablespoon fresh thyme leaves, or more to taste
• 1 tablespoon minced fresh sage, or more to taste
• 3 pounds sweet potatoes, peeled and thinly sliced
• 0.75 teaspoon ground black pepper
• 1.5 cups shredded Gruyere cheese
• 1.5 teaspoons sea salt
• 0.5 stick unsalted butter

Recipe Instructions

Step 1

Bake in the preheated oven until golden brown and bubbly, about 30 minutes.

Step 2

Preheat the oven to 400 degrees F (200 degrees C). Coat a baking dish with cooking spray.

Step 3

Combine cream, butter, and garlic in a saucepan; bring to a simmer. Off heat, stir in parsley, thyme, sage, rosemary, salt, and black pepper.

Step 4

Arrange ½ sweet potato slices in the prepared baking dish; cover with ½ Gruyère cheese. Pour cream mixture on top. Arrange remaining ½ sweet potato slices over cream; sprinkle remaining ½ cheese on top.