1: In a large frying pan over high heat, pour in 4 tablespoons oil and when hot, add 200 g cooked potatoes, sliced or diced.
2: Toast them to your liking, stirring as little as possible so as not to break them up too much, and add salt at the end of cooking. Set aside on a plate.
3: Wash and drain 500 g fresh spinach. In the same frying pan, pour in 4 tablespoons oil then, when hot, add the spinach.
4: Melt (cook) them for a few minutes, stirring constantly, and add salt at the end. Set aside on a plate.
9: Check for doneness by checking the color of the appliance.
10: It's not essential, but it's always prettier if you turn the quiche over in the serving dish, for your guests' viewing pleasure.
Remarks
In step 3, you can use cooked spinach instead of fresh. If you don't have spring onions, replace them with shallots. Depending on your taste, you can use cooked, peeled or unpeeled potatoes.