Darren McGrady, the late Princess Diana didn’t exactly have a magic touch in the kitchen.“The princess was an awful cook,” the culinary pro, 58, who worked for the royal family for 15 years, told Us Weekly exclusively last month. “She didn’t like to cook at all in the kitchen.”McGrady recalled one instance in which Diana had invited a friend over to Kensington Palace for lunch on a weekend and decided to make some pasta.