Boil your selected amount of eggs.
Store the boiled eggs in the fridge to cool.
If you're making bacon, do that while the eggs are cooling. Don't crisp the bacon; you'll want soft meat for these eggs. Degrease the bacon with paper towels. And separate the fat from the meat. (Or use real bacon bits.)
Mince one onion, set aside in a small bowl with a paper towel lining.
Mince one celery stalk, set aside in a separate bowl lined with a paper towel.
Once you have your minced ingredients ready.
Peal and cut each egg in half
Scoop all the yolks into a larger bowl
Add your mayo, spicy brown mustard, salt and pepper
Slowly mix in your minced onions; don't forget to taste test!
Mix in your bacon
If you're using celery, mix in slowly just like the onion.
You can either mix the celery leaves as well or just top the filled eggs with the leaves.
Once you've made your filling according to your taste. Scoop the filling into the eggs.
I salt and pepper the egg dish before I place the eggs. Also salt and pepper the finished eggs.