Avocado Deviled Eggs

These were yummy. We had boiled eggs left over from Easter so we gave these a shot. I was a little nervous but they were delish!

12 eggs
1/2 c. mayo
4 tsp mustard
1/2 tsp salt
1/4 tsp pepper
1/2 med. onion*
1 stalk celery*
1 avocado
yolk from the eggs

Dice the onion and celery very fine. Mix everything else together and spoon into eggs.

*I didn't do onion and celery I just used onion powder and celery salt