Liars

a missing moment from 'The Firebending Masters'

Katara insisted that Zuko couldn't be trusted to take Aang alone to those Sun Warrior ruins. It was probably another one of that traitorous firebender's traps to capture the Avatar! Fortunately, Aang and Toph agreed with her suspicions. They decided that the best option was to have both Katara and Toph accompany them on the journey, right after breakfast…

But when Katara came out of the kitchen with the morning jook, Toph sweetly informed her that Aang and Zuko had grabbed some apples and left on Appa without breakfast.

Katara refused to believe it had all been Aang's idea.