Jess I stopped making bread and put away the bread baking books about 18 years ago. However, I can find low carb breads in the grocery store, thin breads with about 8-10 carbs. These are about 3.5 inch rounds and 1/2 inch thick; these are pre-split for a sandwich. For my teens, not me. I cannot eat bread without triggering a binge. I also found sliced breads, perhaps one at 10 carbs PER SLICE.

Sorry I dont have any recipes to share.

If I were to try to make such a bread I would consider using finely ground bran and gluten. The gluten gives that sticky stretchy property. Otherwise I have heard of breads using whipped egg whites folded in. I have not tried any of these.

Cake is a cup, is one I did make using bran. It is like the baked beans brown bread that is heavy. Usually I added cocoa to make it chocolate rather than bread. Maybe add anise seed or fennel or similar to make it like a heavy rye.