Layers of creamy potatoes, onions, and Gruyère-cheddar blend baked under a golden crust. British comfort at its finest.
# What You’ll Need:
→ Vegetables
01 - 2.6 lbs floury potatoes (Maris Piper or Yukon Gold), peeled and thinly sliced
02 - 2 medium onions, thinly sliced
03 - 2 cloves garlic, minced
→ Dairy
04 - 5 oz Gruyère cheese, grated
05 - 5 oz mature cheddar cheese, grated
06 - 1 1/4 cups heavy cream
07 - 3.5 tablespoons unsalted butter
08 - 1/2 cup whole milk
→ Seasonings
09 - 1/2 teaspoon freshly grated nutmeg
10 - 1 teaspoon Dijon mustard
11 - Salt and freshly ground black pepper to taste
→ Topping
12 - 2 tablespoons fresh chives, finely chopped
# Method:
01 - Preheat oven to 375°F. Butter an 8-cup ovenproof pie or casserole dish.
02 - Melt butter in a large saucepan over medium heat. Add onions and garlic, cooking for 6-8 minutes until soft and translucent, stirring occasionally. Remove from heat.
03 - In a bowl, whisk together heavy cream, milk, Dijon mustard, nutmeg, salt, and pepper until well combined.
04 - Arrange half of the potato slices in the prepared dish in slightly overlapping layers. Top with half of the onion mixture and sprinkle with half of the Gruyère and cheddar cheeses.
05 - Repeat with remaining potatoes, onion mixture, and cheeses in the same layering pattern.
06 - Pour the cream mixture evenly over the layers. Press down gently with a spatula to compact the ingredients.
07 - Cover the dish with aluminum foil and bake for 40 minutes at 375°F.
08 - Remove foil and bake for an additional 20 minutes until the top is golden brown and the sauce is bubbling at the edges.
09 - Let the pie rest for 10 minutes before serving. Garnish with fresh chives if desired.