D.O.P stands for Denominazione d'Origine Protetta (loosely, protected designation of origin). It’s a designation given to tomatoes, cheeses, oils and other products that are from a particular region in Italy and adhere to strict guidelines when growing and processing. D.O.P. tomatoes tend to be more consistent in quality and flavor and many brands of D.O.P tomatoes are sold in the United States. While these are called crepes, because of the high egg content in the batter, they resemble pasta more. It’s important they have no color on them. Magically, they don’t stick to the stainless skillet, they kind of cook slowly and almost steam, so no need to grease the pan. Just make sure your pan is heated. You can cook them in a nonstick skillet too, but they don’t come out as well. The material of the skillet tends to scorch the eggs, giving them a weird smell and flavor, and the dark nonstick imparts color before the crepes are fully cooked.