To criticize dinner

"I'm not a fish!" Frobisher shouted.
"They're not that picky," the Doctor replied from the next cauldron.
"You said they eat fish."
"No, I said they eat anything that swims. You had to hunt those Gumblejacks!"
"I'm a penguin. I can't leave without tasting the best fish around."
Frobisher slapped his marinade. Several droplets ended on his face.
"Good sauce," he licked himself.
"Hey! There's something missing here!"
Their kidnappers frowned.
"What are you doing?" the Doctor hissed exasperatedly.
"Playing for time."
"Great, for what time? Until we're cooked?"
"Got any better ideas?"
"Ehm... Hey! The marinade's not good enough!"