Are you looking for something that looks and tastes like elvish bread could look and taste like or are you looking for a super filling and nutritious bread? Or a movie accurate version?

For the former, I don't know what you imagine. Look for a bread recipe you envision as elvish and play around with it, adding spices.
For the latter, german Pumpernickel is the go-to bread.
For a movie-like lembas, go for shortbread