Healthy cooking in the modern era has always emphasized nonstick cookware. That’s why the latest generation of nonstick pans is such a welcome development. These new pans have harder, glass-based ceramic enamel surfaces that are downright slippery. They have higher temperature tolerances, too, and none of the environmental worries that haunted traditional nonstick cookware in the past decade. (The coatings in older pans released toxins during manufacture or when heated to high temperatures.)If you’re ready to buy, choose a ceramic nonstick pan with some real heft. Thin ones are too flexible and can chip or crack the nonstick surface. Don’t nest them with other pans when storing. And use nonmetal utensils that won’t damage the surface.