Cats are not supposed to eat food for humans, it is very, very bad for them. IF you want to feed cats, buy cat food.

About food for you, a was mentioned above, the big white box in your kitchen is a freezer, you can actually freeze food in it. And you can thaw it and heat it up when you want to eat it.
The other option would be to cook only as much food as you are going to eat.
There...the solution to your problem:)