How do you make a 5 year old eat, within the hour?

So every day for our normal routine we like to sit at the dinner table together as a family. We say a prayer for the food then dig right in. Corban, doesn't just dig right in. He likes to stir in it sing songs, maybe a little nibble, then pick up whatever is sitting next to him and play with it, or ask 50,000 questions, why mommy, why daddy? WHY! WHY! WHY! WHY!
So we say "corban eat, corban hurry up, corban stop playin and eat!" I even went as far as getting him started an hour early before us so he could be caught up by the time we started. No worky! Well tonight I finally decided to do something about it.
Since he is so distracted and can't eat I put him on a chair with a little table facing the door thinking it would be a motivation to get him to eat faster with no distractions. Its all quiet Corban is in his corner we are feeding Peyton then all we hear is tap, tap, tap. Corban has started a drum solo on the little stinkin table to pass the time away!
So I am out of options, anybody have any suggestions?
I keep thinking about the time when I was in boot camp when all we had was 5 minutes to down a three course meal. Sure hope he doesn't decide that route when he turns eighteen. Somebody help us!!!!!
Josh