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How to Make French Potato and Onion Gratin

French Potato and Onion Gratin, known as "Gratin Dauphinois," is a classic dish that combines creamy potatoes and sweet onions for a comforting and flavorful side. This recipe is perfect for gatherings or a cozy family dinner. In this article, we will guide you through the steps to create this delicious dish at home.

Ingredients

  • 4 large potatoes (Yukon Gold or Russet)
  • 2 large onions (yellow or sweet)
  • 2 cups heavy cream
  • 1 cup grated Gruyère cheese
  • 2 tablespoons unsalted butter
  • Salt, to taste
  • Pepper, to taste
  • Fresh thyme (optional, for garnish)

Instructions

Step 1: Prepare the Ingredients

Start by washing and peeling the potatoes. Slice them thinly using a mandoline or a sharp knife, aiming for approximately 1/8 inch thick. Then, peel and thinly slice the onions.

Step 2: Preheat the Oven

Preheat your oven to 375°F (190°C). This will ensure it’s hot enough to cook the gratin evenly.

Step 3: Layer the Potatoes and Onions

In a buttered baking dish, create layers by starting with a portion of sliced potatoes, followed by a layer of sliced onions. Sprinkle a little salt, pepper, and a bit of the grated Gruyère cheese between layers. Repeat this process until all the potatoes and onions are used, finishing with a layer of cheese on top.

Step 4: Add the Cream

Pour the heavy cream evenly over the layered potatoes and onions. The cream will soak into the layers and create a rich, silky texture during baking.

Step 5: Bake the Gratin

Cover the baking dish with aluminum foil and place it in the preheated oven. Bake for about 45 minutes. After this time, remove the foil to let the top brown. Continue baking for an additional 20-30 minutes, or until the potatoes are tender and the top is golden brown and bubbly.

Step 6: Let it Rest

Once baked, remove the gratin from the oven and let it rest for about 10-15 minutes. This resting period allows the dish to set and makes for easier serving.

Serving Suggestions

Serve your French Potato and Onion Gratin hot, garnished with fresh thyme if desired. This dish pairs wonderfully with roasted meats, grilled vegetables, or a fresh salad for a complete meal.

Tips for the Perfect Gratin

  • For added flavor, consider incorporating garlic or nutmeg into the cream mixture.
  • Experiment with different cheese varieties, such as cheddar or mozzarella, for a unique twist.
  • If you prefer a lighter version, substitute half of the heavy cream with milk.

With this simple yet delectable French Potato and Onion Gratin recipe, you can bring a taste of France to your dinner table. Enjoy the creamy layers and savory flavors that make this dish a beloved classic!

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