Preheat the oven to 200°C/180°C fan/gas 6. Line a 20 x 30cm roasting pan with parchment paper. In a frying pan, melt the butter and sauté the leeks for 8-10 minutes, until tender, adding a splash of water if they start to stick, then transfer into a bowl. Fry the bacon in the pan for 5 minutes, or until crisp. Allow to cool before adding to the leeks.
STEP 2
Season the leeks and bacon with the other ingredients. Cook for 20-25 minutes, or until set, in a prepared roasting pan. Serve with salad and crusty bread, sliced into squares.