This is a childhood memory viewed dimly decades later. I am pretty sure that I read it before 1990, and the odds are decent that it was written before that because it was a book either we or my grandmother had in the house. It was written in English, with illustrations on each page. Being a young child's book (probably less than 20 pages) there wasn't a lot of subtlety to it. There was a woman (or maybe a girl) who lived on a mountain-top who had a house and a garden, if not a farm. I remember a scene where she was filling a metal bucket from a pump. A (Western style) dragon starts to menace her. Fortunately, a very tough and mean man (or boy) lived on the other side of the mountain and he came and beat the dragon (I want to say that it showed him taking it down with one punch), and then the two of them lived happily ever after.
The ambiguity of age is that I remember them being spoken of as adults, but the illustrations were of two black children. I remember the girl as being dressed pretty conservatively, in a full-length dress. I think the boy was wearing a shirt and pants, and was bald.
I know it's not a ton to work on. I remember peas being grown in the garden, although I don't remember if they were relevant to the plot.