01 -
Set oven to 175°C. Grab a 23-centimeter pie dish and pop some parchment paper in it.
02 -
In a skillet over medium heat, cook the sausage until fully browned and crumbly. Take off the heat and let it cool down a bit.
03 -
Crack the eggs in a big bowl, pour in the milk, and toss in Herbes de Provence, salt, and black pepper. Whisk it all together until you don't see any streaks.
04 -
Dump in the shredded potatoes, chopped kale, that cooked sausage, and 65 grams of the Gruyère cheese. Give it a good mix so everything's all spread out.
05 -
Pour what you just mixed into the pie pan. Sprinkle the rest of the cheese on top. Loosely cover with foil and slide it into the oven for 30 minutes, or a bit longer if you use fresh potatoes. Bake until the middle is cooked through.
06 -
Take the foil off. Crank up the oven to somewhere between 200 and 230°C. Bake another 10 minutes so the top gets golden and crispy. Let it chill for about 10 minutes before you grab a knife and slice it up.