Black pepper chicken casserole, anyone?

I was cooking my MIL's chicken casserole and then it happened! Was seasoning the chicken with salt and black pepper while it was cooking in the pot and not realising I'd opened the jar of coarse black pepper (including the middle lid), I gave the whole jar a big shake (very hard to shake them out). To my horror! There was a mountain of black pepper in the pot. I looked at the jar and it was empty! I'd poured the whole jar of black pepper into the pot (it was a rather new jar so plenty in it). Luckily there were just chicken, potato and carrots inside. So I poured them into the colander and gave it a good rinse. So now I've run out of black pepper in the house.