Layers of creamy potatoes, onions, and Gruyère-cheddar blend baked until golden. Vegetarian British comfort food.
# What you need:
→ Vegetables
01 - 2.6 lbs floury potatoes (such as 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 (optional)
# How to Make It:
01 - Preheat the oven to 375°F. Butter an 8-cup ovenproof pie or casserole dish thoroughly.
02 - In a large saucepan, melt the butter over medium heat. Add the onions and garlic, cooking for 6 to 8 minutes until soft and translucent but not browned. Remove from heat.
03 - In a mixing bowl, whisk together the heavy cream, whole milk, Dijon mustard, nutmeg, salt, and pepper until well combined.
04 - Layer half the potato slices in the prepared dish with slight overlapping. Top with half the onion mixture and sprinkle with half the Gruyère and cheddar cheese.
05 - Repeat with the remaining potatoes, onion mixture, and cheeses in the same order.
06 - Pour the cream mixture evenly over all layers. Press down gently with a spatula to compact the layers.
07 - Cover the dish with aluminum foil and bake for 40 minutes in the preheated oven.
08 - Remove the foil and bake for an additional 20 minutes until the top is golden and bubbling at the edges.
09 - Allow the pie to rest for 10 minutes before serving. Garnish with fresh chives if desired.