"Soup is what happens when I have leftovers in the house and it's time to clear out the veggie drawer. I got the inspiration while lunching at the Palm Tree Grille in Mount Dora when attending the annual Plant and Garden Sale. I didn't have their soup but it was on special. This will be great for lunches during the week."
Heat olive oil in a large pot over medium heat. Add onion, carrots, celery, and garlic; cook and stir until onion is translucent, about 5 minutes. Stir in baby spinach.
Pour chicken broth, diced tomatoes, and lemon juice into the pot. Stir in pepper, oregano, and basil. Bring to a boil; stir in chicken and rice. Reduce heat to medium-low and simmer until flavors combine, about 30 minutes.