Using the wrong protein
Lasagne can be made in several ways. Although there is no set method even in Italy, most people would agree that a traditional lasagna is created with a thick, meaty ragù. However, in today's health-conscious society, many home cooks are searching for techniques to make traditionally heavy dishes like lasagna lighter. It's alluring to occasionally alter recipes by using lean ground beef, turkey, or chicken for the traditional lasagna ragù, but this is erroneous. Even though you may be attempting to reduce the amount of fat in your diet, a great ragù needs the fat.
The New York Times claims that to maintain the desired flavor and texture, a good ragù needs to contain both beef and pork. The red sauce needs the richness that pork provides because beef does not have enough fat to flavor it on its own. Use a mixture of ground beef and pork for your meaty ragù and reserve the lean meats for other dishes.