Aubergine and butter bean moussaka with Béchamel sauce family recipe, by Marley Spoon

To prepare aubergine - heat the oven to 220°C (fan). Top and tail aubergines and slice into 5mm rounds. Mix with 1tbsp oil in a big bowl and place on a baking tray. Season well with salt and black pepper. Bake for 15mins until tender. Once baked, leave the oven on.

Make filling

Peel and finely chop onion. Peel and finely chop the garlic. Heat 1tbsp of olive oil in a medium-sized saucepan. Cook onion and oregano on a medium heat for 5mins until soft. Add the garlic

Finish filling

Now, add the beans, tomatoes, 1tsp of sugar and salt and pepper, simmer for 3-4mins until thickened.

Make sauce

Melt butter in a medium saucepan on medium heat, add 3tbsp flour (heaped). Cook for 1min off the heat and gradually add milk, whisking to make a smooth sauce. Return to a medium heat and simmer, stirring constantly until thickened, about 4mins. Leave to cool slightly.

Assemble moussaka

Spread half the filling into an ovenproof dish. Add a layer of aubergine. Repeat to create another layer. Beat egg, nutmeg, half the Parmesan into the cooled sauce, season. Pour on top of the dish and sprinkle the remaining cheese. Bake for 15mins on the top shelf.

Make salad and serve

Meanwhile, cut cucumber in half lengthwise and scrape out the seeds. Cut into quarters lengthwise, slice thinly. Cut tomatoes in half. Mix together 2tsp vinegar (preferably balsamic) and 1tbsp olive oil. Toss with cucumber and tomato and serve with the moussaka.