Add the psyllium husk and oil into the batter of whatever you're making.
After all other ingredients have been combined, mix the gelatin and cold water/milk/juice.
Let sit 1 minute.
Add the hot water to the gelatin mixture and stir to dissolve.
Immediately add the gelatin mixture to the batter and mix well.
Proceed with the baking instructions of your recipe.
The cold water/milk/juice should be some of the liquid already called for in the recipe to avoid too much liquid.
This replaces 1 egg.