- Start by chopping the onion and celery into small, uniform dice, and mincing the garlic. Set aside. 
- Place a large heavy-bottomed pot over medium heat and add a tablespoon of olive oil. Once shimmering, add the diced onions, celery, and minced garlic. 
- Sauté the vegetables, stirring frequently, until the onions become translucent and fragrant, about 5 minutes. The mixture should smell sweet and savory. 
- Add the bone broth to the pot along with the chicken thighs. Bring the mixture to a gentle simmer, watching for small bubbles around the edges. 
- Reduce heat to low and cover the pot. Let it simmer uncovered for about 20 minutes, stirring occasionally, until the chicken thighs are cooked through and tender. 
- Remove the chicken thighs from the soup and shred the meat with two forks. Return the shredded chicken to the pot. 
- Stir in lemon juice and season with salt and pepper to taste. Add chopped herbs like thyme or parsley for a fresh pop of flavor. 
- Give the soup a final taste and adjust seasoning or acidity if needed. The broth should be bright and flavorful, with a glossy surface. 
- Serve the hot keto chicken soup in bowls, garnished with extra herbs if desired, and enjoy its comforting warmth and nourishing texture.