Rinse all of your vegetables well (If using leeks, make sure you thoroughly rinse inside the leeks to get any sand out.)
You do not need to chop your vegetables. You can break most of the vegetables in half by hand. Cut the onions into quarters (keep the onion peels). Pre-heat a dutch oven or heavy-bottomed stock pot over medium high heat for a minute or two.
Add the onions (flesh side down) into the pot and let it sear for about 20-30 seconds, until some golden color is left in the pan. Careful not to let it burn, you want some golden color to form.
Add a splash of the chicken broth to the pan and deglaze.
Add all of the ingredients into the pan and stir.
Bring to a boil, then reduce heat to a simmer with the lid slightly ajar. Simmer for about an hour, stirring occasionally. Remember, don't season with salt.
Remove the chicken and set aside (use in another recipe), and discard the vegetables. The nutrients have been removed and they will not be appealing or tasty.
Strain the bone broth into another bowl to remove any left over particles or sediment.
Allow to cool and store in a mason jar in the refrigerator.