Saute Aromatics: Heat olive oil and butter in a large pot over medium heat. Add minced garlic and chopped onion, and sauté until fragrant and translucent.
Veggie Medley: Incorporate carrots and celery into the pot, stirring occasionally for a few minutes until slightly softened.
Flavor Infusion: Sprinkle in Vegeta stock powder (or bouillon cubes/powder) and black pepper, stirring to combine with the veggies.
Broth And Chicken: Pour in chicken broth and water, then add the chicken thighs to the pot. Bring to a gentle boil, then reduce the heat to simmer, covering the pot partially with a lid. Cook for 25-30 minutes until the chicken is cooked through.
Rice Addition: Remove the chicken thighs from the pot and set aside to cool slightly. Add the uncooked rice to the simmering broth and vegetables. Simmer for 15-20 minutes until the rice is cooked and tender.
Shredding Chicken: While the rice is cooking, shred the chicken thighs using two forks or your hands.
Final Touches: Once the rice is tender, return the shredded chicken to the pot. Season with salt to taste and add dried parsley. If desired, incorporate optional seasonings – chopped parsley, dried thyme, and oregano.
Serve And Enjoy: Ladle the soup into bowls, garnish with fresh parsley if using, and serve hot.