Sliced Potato and Onion Gratin

This Sliced Potato and Onion Gratin is a delightful blend of creamy, cheesy goodness with a hint of earthy flavors from the onions and potatoes. The layers of thinly sliced potatoes are perfectly baked to golden perfection, while the onions add sweetness and depth. A sprinkle of fresh herbs elevates this traditional dish with a modern twist, making it a perfect side for any meal. It's vegetarian-friendly and can be made gluten-free by using gluten-free breadcrumbs.

Ingredients:

• 4 medium potatoes, thinly sliced
• 2 large onions, thinly sliced
• 2 cups heavy cream
• 1 cup grated Gruyère cheese
• 1/2 cup grated Parmesan cheese
• 2 cloves garlic, minced
• 1 teaspoon fresh thyme, chopped
• 1 teaspoon fresh rosemary, chopped
• Salt and pepper to taste
• 1/2 cup breadcrumbs (gluten-free if desired)
• 2 tablespoons butter, for greasing the baking dish

Instructions:

1. Preheat the oven to 375°F (190°C).
2. Grease a 9x13 inch baking dish with butter.
3. In a mixing bowl, combine the heavy cream, minced garlic, thyme, rosemary, salt, and pepper. Mix well.
4. Layer half of the sliced potatoes in the bottom of the prepared baking dish.
5. Spread half of the sliced onions over the potatoes.
6. Pour half of the cream mixture over the layers.
7. Sprinkle half of the Gruyère cheese over the cream.
8. Repeat the layers with the remaining potatoes, onions, cream mixture, and Gruyère cheese.
9. Top with grated Parmesan cheese and breadcrumbs.
10. Cover the baking dish with aluminum foil and bake for 45 minutes.
11. Remove the foil and bake for an additional 15-20 minutes, or until the top is golden and bubbly.
12. Let it cool for a few minutes before serving.