In reply to machino:
Another +1 for the seafood cafe, not too far to travel from Glencoe.
The Holly Tree also does excellent food, with a slightly less seafood focussed menu.
The Crannog in Fort Bill is also good, but a bit of a drive for an evening meal if staying in Glencoe. Used to do a really good lunch though.
Was a bit disappointed with the food last time I was in the Clachaig, but may have been a bad menu selection by me.