More Awesome Than You!

I would really like to have an option on cakes (and other meals too, but mainly for cakes) "divide" which allows the sim to serve the cake and put the slices in his inventory, for bakery to sell slices of cake. I don't know if it's possible, but if it is I really really want it.
I see it like this : when told to "divide" the cake the sim takes the plate, put it on a counter (like when you tell him to serve and he's alone) takes a slice and "pouf" the slice disappears (and appears in the sim's inventory), the sim takes another slice and so on  until the plate is empty.

Many thanks to whoever even bothers to answer me.
Pioupiou

If your Sims makes a meal or dessert and serves it, and you cancel out the interation just before he/she sits down to eat a slice, you can place the individual servings in the inventory and sell them.

I know this, but I'm asking for a hack to avoid all the boring clicking (click serve, click cancel, click put in the inventory etc....) : I'm a bit lazy !  :D

What I hate is that when they make just one meal, it doesn't go into the inventory, I have to mess about putting it in there.  I'd like an option to add it to the inventory if it isn't going to be served and eaten, which in my game it isn't, otherwise I'd ask them to "serve meal".  The only time I ask them to make meals which are going to be eaten are single servings, if there's a kid to feed.  If they have several kids to feed, they have to make several servings, because I refuse to waste food and STILL Maxis haven't provided an option to choose how many meals to make. 

Ancient, does it matter? You can stick the leftovers in their inventories for later, thus saving food that would have previously gone bad.