Ingredients
Method
Preparation
- Preheat your oven to 375°F (190°C).
- Generously grease a 9x13 inch baking dish with butter.
- In a medium saucepan, melt the butter over medium heat.
- Add the finely chopped onion and sauté until translucent, about 5 minutes.
- Stir in the minced garlic and cook for another minute.
- Pour in the heavy cream along with thyme, salt, and pepper, and heat just to a simmer before removing from heat.
- Begin layering half of the thinly sliced potatoes in the prepared baking dish.
- Pour half of the cream mixture over the potatoes, followed by half of the grated cheddar and Gruyère cheeses.
- Layer in the remaining potatoes, pour the rest of the cream mixture, and top with the remaining cheeses.
Baking
- Cover the dish tightly with aluminum foil and bake for 45 minutes.
- Remove the foil and bake for an additional 15-20 minutes, until the potatoes are tender and the top is golden brown and bubbly.
- Let the gratin cool slightly before garnishing with fresh parsley.
Notes
For best results, slice potatoes evenly and avoid rushing the sautéing process. Let cool briefly before serving to enhance flavors. Consider using healthier alternatives like half-and-half or incorporating steamed vegetables.
