Psyllium makes a suitable replacement for an egg when mixed with water. This egg replacer would be used in baked goods or as a binding ingredient- not suitable as scrambled eggs or the like. I've tried it in a cookie recipe and it worked out great. Psyllium can also be added with dry flour ingredients to add some extra fibre to a baked good, such as a muffin, or to provide some extra stability to gluten-free cooking. The following will replace one egg and has very little taste. I also add some psyllium to my rissole/burgers to add some binding to them.