In a large pot, heat 2 tbsp olive oil and soften the diced onion for 3–4 minutes.
Add 1 cup carrots, 1 cup celery, 1 tsp garlic powder, 1 tsp onion powder, 1 tsp salt, and ½ tsp pepper, and cook 3 minutes.
Pour in 8 cups chicken broth and bring to a boil.
Add 1 cup uncooked rice, reduce heat, and simmer 15 minutes.
Stir in 1 lb shredded chicken and simmer 5 more minutes until the rice is done.
Taste and adjust seasoning.
Optional: Add a squeeze of ½ lemon for the grown-ups.