Gather all your ingredients so everything is within reach. It makes the cooking process smooth and enjoyable.
Heat a large heavy-bottomed pot over medium heat and add a splash of olive oil until it shimmers and gently ripples.
Add diced onions, carrots, and celery to the pot. Sauté for about 5-7 minutes until the vegetables soften and release a sweet, earthy aroma. Stir occasionally to prevent sticking.
Push the sautéed vegetables to one side of the pot and add the diced chicken to the cleared space. Cook for about 8 minutes, stirring occasionally, until the chicken turns lightly golden and is cooked through.
Pour in the chicken broth and bring the mixture to a gentle simmer. Reduce the heat slightly and let it bubble gently for 20 minutes, skimming off any foam that rises to the surface.
Add chopped kale or spinach into the pot during the last 5 minutes of cooking. Stir until the greens wilt and turn a vibrant green, adding freshness and color.
Stir in the lemon zest and chopped fresh herbs, allowing the bright citrus aroma and herbal notes to infuse the broth with a lively flavor.
Taste the broth and adjust seasoning if needed, adding a pinch of salt or pepper to enhance the flavors.
Use a ladle to serve the steaming, vibrant green soup into bowls, making sure to include plenty of chicken and vegetables in each serving.
Enjoy your bright, nourishing bowl of lemon chicken soup — perfect for a quick, comforting meal that feels like sunshine in every spoonful.