In a large oven-safe pan, combine the rice, sliced zucchini, garlic powder, onion powder, salt, and pepper.
Pour the vegetable broth over the mixture, then drizzle with olive oil.
Stir everything together, then cover the pan with foil.
Bake in the oven for 25 minutes.
Remove the foil, sprinkle the cheese on top, and bake for another 10 minutes until the cheese is bubbly.