I found this recipe for a carb-free hamburger bun here
The bun consists of:
- 1 Egg
- 2 Tbsp Butter
- 4 Tbsp Flax Meal (mine has chia also)
- 1/4 tsp Baking Powder
- Salt to taste
You just throw all the ingredients together and mix in a microwave safe bowl. Microwave for about 1 minute (until the middle is set). Once it is done, cut it in half, just like a bun. Next, stack your burger ingredients, I just like cheese, bacon and mayo!
It's not Hawaiian bread or anything, but it gets the job done.
I was impressed with how well it held up to the weight of the burger. If you aren't big on the taste, try adding more butter or salt. Butter and salt help everything!