Could she go to him (in person or by writing) and in his presence eat as much as a single mouthful of humble-pie?
In that respect I often have here to eat a slice of humble-pie.
She marched in with a half-defiant air—evidently "humble-pie" had at present no attraction for her.
Come, Gildy, knuckle under and eat your humble-pie like a man.
Meanwhile, George Neston was steadily and unflinchingly devouring his humble-pie.
Well, the sooner he has his plateful of humble-pie the better; eh, lads?