Kieren's always been rather sparing with his praise, choosing to provide it only when he feels it well deserved. In truth, Sirius likes it that way if only because it makes garnering Kieren's approval that much more rewarding.

"I'm not shocked," he says before adding a bit of a lie. "I knew it would be good. After all, it's not like it can possibly be that difficult, can it? It's just like making potions." Nevermind the fact that Sirius had always struggled a bit with potion.

He gives Kieren's foot a light nudge beneath the table then, a bit more playful. "Eat up then. Can't let any go to waste."