I think you can work in a later lunch if you feel like you have to feed them all at the same time. But you will have to find a way to have a snack in the morning. Personally, I would do that over any kind of structured event. Perhaps you can move something from morning to afternoon?
When it comes to the slow-cooker, I agree that it will not necessarily help at lunch, but I love them for supper!! Perhaps just google "slow cooker recipes"? See if you can find some you like.