I dont know why... but the best cooks I know are virgo, if and only if they even cook though. I think it's cuz we over analyze and try to understand quality of food and taste, therefore making us pretty interesting chef.
there's a caveat though, virgo can be healthcares conscious , therefore if you meet a health conscious virgo chef, that food will be so bland.
I know one, she doesn't use a lot of salt, sodium bad or fat, fat is bad, or sugar, sugar is bad....
so when she cook it's like you're eating the raw flavor of food.
the Aquarius I know which is many, doesn't care for cooking.
scorpio tend to be good cook if they enjoy it. they're passionate about things after all