Mix the ground flaxseed with the warm water and let it sit for 15-30 seconds before adding it to the recipe of your choice.
I use ground flaxseed as my egg replacer. To replace one egg, all you do is combine one tablespoon of ground flaxseed with two tablespoons of warm water. My mix required three eggs so I used 3 tablespoons of ground flaxseed and 6 tablespoons of warm water. This is the flax I use: Spectrum Essentials Organic Ground Flaxseed. I prefer the nutritional properties and texture of the flax but you can also use egg replacers like Ener G Egg Replacer.