01 -
Preheat oven to 190°C (375°F). In a skillet, sauté leeks in butter over medium heat until soft and slightly translucent, about 5-7 minutes.
02 -
Transfer the sautéed leeks to a baking dish. Pour heavy cream evenly over the leeks and season with salt and pepper.
03 -
Sprinkle grated Gruyère cheese over the top and bake in the preheated oven for 20 minutes until golden brown and bubbly.