She's a bad cook. How can I tell her that?

I always knew that most Colombian women are fond of cooking and are good cooks. My wife is a Colombian and is indeed fond of cooking, however, she not a good cook. She loves cooking but cooks terribly. We just got married two weeks ago and I’m so glad that she wants to cook for me. But I don’t like its taste. I don’t want her to be upset when I tell her that. How should I do it? 

Maybe you could take a "hobby" type of cooking class together, then join a dinner club. (Definitely the class first) Or even a series of cooking workshops. Pretend it is for your benefit, of course... That you want to take an active part in her hobby, develop a cultured appreciation for different cuisines, etc. She will slowly get re-educated.