To a large pot on the stove over medium heat add in the olive oil once hot add in the onion, garlic, tomatoes, and zucchini stir well let cook together for 3 minutes.
Turn the heat to high and add in the orzo, broth,, and seasonings stir well and bring to a boil once boiling turn the heat down to a high simmer.
Let simmer for 8-10 minutes stirring occasionally until the orzo is tender.
Stir in the chopped spinach and parmesan cheese and let cook for 1-2 minutes.