Boil the chicken thighs in a pot along with the eggs, remove the eggs about 2 minutes after the water starts to boil and place in cold water. Boil the chicken until cooked through then remove from the water and allow to cool. Skim any foam off the top of the water and you have chicken stock you can refrigerate.
While the chicken and eggs are cooling, chop the onion, spring onions, celery including, and leaves, and the bell peppers. Place in a large bowl. This photo only shows onion, yellow bell pepper and eggs, see, make this with what you have on hand.
When the chicken is cool enough to handle, remove the skin and bone and save for a snack for your dog, and simply shred the meat with your fingers and place into the bowl with the chopped veggies. This photo is the 5 chicken thighs I used for these photos.
Peel the eggs, and chop and add to the bowl with the chicken and veggies. Thighs shredded, use your fingers, added to the bowl.
Give the items in the bowl a good mixing, then start adding mayo, start with several large spoonfuls first, keep mixing and adding mayo until everything is coated well but not dripping with mayo. Sprinkle in some ground black pepper, another quick stir, then refrigerate for several hours. Serve as is, on crackers, or even a sandwich.
Mixed and ready for the fridge.