Yes. But then, even a bad cook can say that his food is sweet because tastes vary with different perso. Whatever you find sweet might not be sweet to another person. My elder brother is a chef and he's the one who taught me to cook several meals and how to make food have some sweet taste. First, I cannot cook food without the natural species like coriander leaves, ginger, pepper and the rest. These natural species are the one's that enhance the taste of a food, tomatoes and onions are essential but cannot give food an extra taste.
But then, there are some meals that will are quite hard to Cook and will need me to refer to YouTube. Actually, YouTube has been my greatest help when it comes to learn new cooking tactics. I love cooking and cooking is my hobby.