Let the brown rice cook for 45 minutes, or until brown rice is fluffy and pleasant to the bite. Take brown rice off the heat and let it stand, covered, for an additional 10 minutes before fluffing with a fork.
Add mushrooms and cubed tofu to baking sheet. Drizzle with 3 TBs of olive oil. Sprinkle with Middle Eastern spice mix, and salt and pepper to taste. Stir well until everything is evenly coated. Transfer to oven to bake for 20 minutes.