Heat the olive oil in a large pot over medium heat.
Add the chicken pieces and cook until golden brown (about 5-7 minutes). Remove and set aside.
In the same pot, add onions, garlic, carrots, and celery.
Sauté until the onions become translucent and the vegetables soften slightly (about 5 minutes).
Add cumin, smoked paprika, and thyme.
Stir for 30 seconds to release the flavors.
Return the chicken to the pot.
Add the lentils, diced tomatoes, and chicken broth. Stir to combine.
Bring to a boil, then reduce heat and let it simmer.
Cover and cook for 20-25 minutes, stirring occasionally.
Season with salt and pepper to taste.
If the mixture becomes too thick, add a splash of water or broth to achieve your desired consistency.
Serve hot, garnished with fresh parsley.