Introduction

If you love creamy, cheesy potatoes with a touch of elegance, these Herb-Infused Potatoes Au Gratin Foil Packets with Leeks are a perfect choice. This dish combines the comforting richness of classic au gratin potatoes with the freshness of herbs and the subtle sweetness of sautéed leeks. Wrapped in foil and baked or grilled, it’s an easy, mess-free recipe perfect for both weeknight dinners and outdoor cookouts.

🧂 Ingredients

• 2 lbs (about 900 g) Yukon Gold or Russet potatoes, thinly sliced
• 1 large leek, cleaned and thinly sliced (white and light green parts only)
• 2 cloves garlic, minced
• 1 cup heavy cream or half-and-half
• 1 cup shredded Gruyère cheese (or Swiss or sharp cheddar)
• 2 tbsp unsalted butter, melted
• 2 tbsp olive oil
• 1 tsp fresh thyme leaves (or ½ tsp dried thyme)
• 1 tsp fresh rosemary, finely chopped (or ½ tsp dried rosemary)
• Salt and freshly ground black pepper, to taste
• Fresh parsley, chopped (for garnish)
• Aluminum foil sheets, heavy-duty

Instructions

1. Preheat the oven or grill:
   • Oven: 400°F (200°C)
   • Grill: Medium-high heat
2. Prepare the potatoes and leeks: Wash and slice the potatoes thinly (about 1/8 inch thick). Clean and slice the leek, removing any dirt between the layers.
3. Mix the seasoning: In a bowl, whisk together the cream, melted butter, garlic, thyme, rosemary, salt, and pepper.
4. Assemble the foil packets: Cut four large sheets of foil. Divide the sliced potatoes and leeks evenly among them. Drizzle each portion with the herb-cream mixture. Sprinkle shredded cheese over the top. Fold the foil over to seal tightly.
5. Cook:
   • Oven: Bake for 30–35 minutes, or until potatoes are tender and cheese is bubbly.
   • Grill: Place over indirect heat and cook for about 25–30 minutes.
6. Finish and serve: Carefully open the foil (watch for steam). Garnish with chopped parsley before serving.

🍽️ Description

These foil packets deliver layers of tender, creamy potatoes infused with aromatic herbs and sweet, mild leeks. The cheese melts into a golden, savory crust, while the cream enriches every bite. Whether served as a side dish for grilled meats or as a vegetarian main course, the result is rustic yet refined—comfort food with a gourmet twist.

Tips

• Uniform slicing: Use a mandoline slicer for even potato slices, ensuring they cook evenly.
• Make ahead: Assemble the foil packets up to a day in advance and refrigerate until ready to bake or grill.
• Extra crispy topping: Open the foil during the last 5 minutes of baking to let the cheese brown slightly.
• Alternative cheeses: Try Parmesan, mozzarella, or fontina for different flavor profiles.
• Add-ins: Bacon bits, caramelized onions, or mushrooms add a rich, savory twist.

Correction

If your potatoes turn out undercooked, slice them thinner next time or increase the cooking time by 5–10 minutes. If the sauce seems too thick, add a splash of milk or cream before sealing the packets.