Depends on the dragon, of course. And their age. Hatchlings of all non-aquatic species taste rather like the fine white meat of a well-done pork chop, the bit just before the fat rind. As they grow older, they taste more like alligator (the tail meat). And then vary. #realmslore

This reminds me of a video that @MrRhexx did years ago when he touched on this topic in one of his dragon videos.