Easy vegetarian lasagne

Photography by Steve Brown Ingredients (serves 6) 2 x 400g cans cherry tomatoes* or crushed tomatoes 100g unsalted butter 100g (2/3 cup) plain flour 1L (4 cups) full-fat milk Good pinch of ground nutmeg 1/2 cup good-quality pesto 300g fresh lasagne sheets 300g fresh buffalo mozzarella* or bocconcini, thinly sliced 200g grated parmesan 8 vine-ripened [...]
