You seem to be baking in a regular oven mode and not microwave. it does not take that long. Go to this url, even thought it is an eggless cake, the one with eggs is also bakes similarly. :
http://niruskitchen.com/recipes/details.asp?recipe_id=491&category_id=38

Makes it lighter.

You can parboil and then freeze it.

Do that. Cannot think of anything else.

Do that, cannot think of anything else