When “Uncle Roger” criticizes Jamie Oliver’s beef dishes, he often points out what he perceives as incorrect cooking methods, like overcooking the meat, not properly seasoning it, or using inappropriate cuts for the dish, usually highlighting how these techniques would not be considered authentic or flavorful in Asian cuisine, particularly when it comes to beef dishes like pho where precise cooking is crucial; essentially, he mocks Jamie Oliver for not understanding the nuances of cooking beef in a traditional manner.