Preheat the oven to 350°F (175°C) and lightly grease a 9x13 inch baking dish with olive oil.
In a medium saucepan, bring the vegetable broth to a boil. Stir in the uncooked brown rice, cover, reduce heat to low, and simmer for about 45 minutes until tender.
Steam the broccoli florets in a steamer basket over boiling water for about 5-7 minutes until bright green and just tender, then set aside.
In a large mixing bowl, combine the cooked brown rice and steamed broccoli. Add the shredded cheddar cheese, cream of mushroom soup, milk, garlic powder, onion powder, black pepper, and salt. Fold together gently until mixed.
Pour the rice and broccoli mixture into the prepared baking dish and spread evenly.
In a small bowl, mix breadcrumbs with olive oil and grated Parmesan cheese. Sprinkle the mixture over the casserole.
Bake in the preheated oven for 25-30 minutes until the top is golden brown and edges are bubbling.
Remove from the oven and let cool for a few minutes. Garnish with freshly chopped parsley before serving.
Notes
For an appealing serving, scoop portions onto individual plates and sprinkle a bit more parsley on top for a pop of color. Serve warm alongside a crisp green salad for a complete meal.