Lasagne al pesto e patate is a traditional dish originating from Liguria. This lasagna casserole is usually made with a combination of lasagne pasta, potatoes, pesto, butter, flour, milk, basil, grated parmesan, salt, and pepper. The potatoes are boiled until just tender, drained, cooled, and sliced thinly.
A mixture of flour, butter, milk, salt, and pepper is made into béchamel sauce, and it's then mixed with grated parmesan. The sauce is spread on the bottom of an ovenproof dish, topped with a layer of potatoes, a layer of sauce again, and it's then dotted with the remaining pesto and lasagne sheets.