Lasagna noodles, • all-purpose flour (about 50 grams) • unsalted butter (about 50 grams) • milk (about 500 ml) • bay leaf • Nutmeg, salt, and pepper, to taste • medium eggplants • shelled walnuts (about 100 grams) • grated Parmesan cheese (about 100 grams) • Olive oil, • Salt and pepper, to taste • Sliced speck, •