Make up for past mistakes by never letting it happen again.
As judge judy said..."he ate the steak" meaning he got it, paid for it, used it. If he didn't like the steak its up to him to get up and walk out and go somewhere else next time.
So even though you didnt think the steak was good and he didnt think the steak was good he has chosen to come back to you for more steak. This doesn't require a discount...just good service from here on out.
Offer the man a good steak. Charge him what a good steak costs. Let him decide if he wants the good steak. If he doesn't he can always call up your competitor and get another terrible steak.
Anyone else hungry now?
Avid Stamp Collector - I really love 39 Cent Stamps