As you know, flan is quite popular with our young Vietnam. It is what you always have in the fridge of every house. Since flan is not only for young people in general, but it also was the young mother's chosen children main dish, side dish for the elderly, or perhaps dessert for the whole family. With main ingredients: milk, eggs, sugar but has a very interesting story as to how a very smart man decided to try different flavors for his family and friends.