Cut the beef into 2cm (¾") cubes and season with half of a teaspoon of sea salt and pepper.
Heat half of the oil in a 28cm or 11" frying pan (not nonstick) and fry the beef in batches until nicely browned, then remove and set aside.
Chop the onion into a 1cm (½") dice.
Add the remaining oil to the pan and then add the onion and cook on a medium-high heat for 10 minutes.
Dice the garlic and chilli as finely as you can, add it to the onions and cook for 1 minute.
Cut the apricots in half.
Throw in the apricots, almonds and return the beef to the pan.
Sprinkle with ground cumin, coriander, turmeric, and paprika, then pour over the water and stir.Add a lid, reduce the heat to low and cook for an hour or until the beef is nice and tender.
Slice the potato as thinly as you can. If you have a mandolin, which is the best tool for this set it to 2mm thick (⅛" or thinner if you like).
Pour the olive oil over the potato and then season with the remaining salt and the zaatar.
Transfer the beef stew to a 21cm x 16cm x 4.5cm or 8″ x 6″ x 2″ casserole dish and layer over the potatoes.
Bake in the oven at 200°C or 400°F for 30-35 minutes.