I found this recipe on Recipezaar, I was impressed. This is very simple and fast, and tastes like bread.
Serving size 1

2 tbs melted butter/margarine
Salt, to taste (I used sea salt)
1 large egg
4 tbs flax seed meal
1/2 tsp baking powder

I have one of those microwavable egg containers, which is the perfect size for a bun. Mix all the ingredients into a microwave safe container, the size of what you want your bread to be. Put in microwave for 1 minute, the center should be spongy to the touch. When it is done, put on a rack to cool. When it is cool, slice it in half and you have the perfect bun. It does not taste eggy like you think it would, I thought the texture was very much like bread. The end product is moist and holds together well, you won't have it falling apart on you. Hope you enjoy!!

Could you post the link to this recipe, please?

Here's the link
http://www.recipezaar.com/Very-Low-...rger-Bun-229625