1. Preheat the oven to 350°F Place the peppers in a roasting tin and drizzle with the oil and balsamic vinegar. Roast for 20 minutes, add the garlic and roast for a further 10 minutes until the peppers are softened and charred. 2. Meanwhile, wilt the spinach in a large pan with a splash of water for 2 minutes only. Season well and set aside. 3. To make the sauce, heat the milk with the bay leaf to just below boiling point and simmer gently for 5 minutes. Melt the butter in a non-stick pan, add the flour and cook, stirring all the time, for 2 minutes. Gradually add the milk, whisking well, and bring to the boil until thickened. Stir in the mustard and half of the Parmesan. 4. To layer up the lasagna, spoon a third of the sauce into the base of an ovenproof dish. Scatter over half of the peppers, half of the spinach and half of the mozzarella. Top with a layer of lasagna. Repeat this process, finishing with the final third of the sauce. Scatter over the remaining Parmesan and bake for 25 to 30 minutes. ---------------------------------------------------------------------------
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Ingredients