For the topping
- STEP 1
Heat the oil in a large saucepan and fry the onion until softened. Add the garlic and cook for a further few mins. Stir in the cinnamon, oregano and chilli flakes. Add the lamb and brown all over for a few mins, breaking it up with a wooden spoon. Drain the fat from the mince and return the pan to the heat. Stir in the tomato purée and cook for 1 min, then tip in the tomatoes. Half-fill the can with water and add to the pan. Stir well, season and simmer for 15 mins.
- STEP 2
Preheat the oven to 180C/160C fan/gas 4. Lightly oil the bottom of a 1.5-litre ovenproof dish and arrange a third of the swede on the bottom. Ladle over half the mince mixture, top with another layer of swede, followed by another layer of lamb. Finish with a layer of swede.
- STEP 3
For the topping, heat the butter in a small saucepan and add the flour. Stir briskly until you have a smooth paste. Remove from the heat and slowly add the milk until you have a smooth sauce. Return to the heat and cook for 4-5 mins until the sauce thickens. Remove from the heat and whisk in the egg and half the feta.
- STEP 4
Pour the sauce over the top of the swede and sprinkle the surface with the remaining feta. Cover with foil and bake in the oven for 35-45 mins. Remove the foil and cook for a further 25-30 mins or until the top is golden and the swede is tender - be sure to test that the swede is fully cooked before serving. Leave to sit for a few mins before serving.