Gather all your ingredients and keep your equipment ready—this ensures a smooth cooking process.
Heat the large pot over medium heat, then add chopped onions and minced garlic. Sauté until fragrant and onions turn translucent, about 3 minutes, filling your kitchen with a sweet aroma.
Add diced carrots, chopped celery, and the bay leaf to the pot. Cook, stirring occasionally, until the vegetables soften slightly, about 5-7 minutes, and the mixture becomes fragrant.
Pour in the chicken broth, then bring the mixture to a gentle simmer. As it heats, skim off any foam or excess fat that rises to the surface.
Let the broth simmer gently for about 20 minutes, allowing the flavors to meld and the vegetables to cook through.
Remove the bay leaf, then stir in the shredded cooked chicken. Season with salt and pepper to taste, and simmer for another 5 minutes to warm the chicken through.
Taste the soup and adjust the seasoning if needed. For a bright finish, squeeze fresh lemon juice over the soup just before serving.
Serve the hot soup in bowls, garnished with fresh herbs if desired, and enjoy the comforting, nourishing flavors.