In a large stockpot or dutch oven, heat olive oil over medium heat while slicing the leek.
When oil is warm, add the leek and saute for a few minutes while dicing the onion.
Add onion to the pot with the salt and sweat while chopping the carrots and celery.
Add carrots, celery, sage, thyme, garlic powder, and worcestershire sauce. Stir to combine.
Add bay leaves, chicken thighs, broth, and lemon juice. Cover, reduce heat, and simmer for 90 minutes.
After 90 minutes, remove chicken to a plate. Remove skin and bone and dice or shred chicken. Return to pot and cook an additional 30 minutes or until carrots and celery are at desired tenderness.
Remove bay leaves and taste for seasoning.