More videos from this episode The Science of Cornstarch Why does cornstarch solve the problem of sauce separating? Pasta, Grains, & Beans Spaghetti with Lemon and Olive Oil (al Limone) Unaccustomed to the spotlight, lemon can turn temperamental in this quick-hit Italian classic--unless you provide it with the prefect costars. Pasta, Grains, & Beans Vegetable Lasagna Ever made a vegetable lasagna that wasn't laden with watery vegetables and dry, grainy patches of cheese? Neither had we. Pasta, Grains, & Beans Whole Wheat Lasagna Noodles When last year’s whole wheat spaghetti tasting turned up more than one pasta that offered pleasantly nutty flavor and tender-firm chew, we wondered if the trend extended to noodle shapes like lasagna.