Braised eggs with leek and za’atar

This is a quick way to get a very comforting meal on the table in a wonderfully short amount of time. It’s a dish as happily eaten for brunch, with coffee, as it is for a light supper with some crusty white bread and a glass of wine. The leeks and spinach can be made up to a day ahead and kept in the fridge, ready for the eggs to be cracked in and braised.