Start the brown rice while continuing with this recipe. Bring rice, water, and coarse salt to a boil. Cover, and let simmer for 30 minutes. Set aside with the lid still on for 10 additional minutes.
In a large frying pan, heat olive oil over med-high heat. Add chicken and stir fry for 2 min, adding salt to season. Add chili powder, cumin and garlic powder, then toss to coat and continue cooking another 3-4 min.
Add red onion, corn and bell peppers, sauteeing for 3-4 min. Add cooked brown rice and salsa, tossing to coat. Cook for 5 min. Mix in cilantro and remove from heat. Sprinkle with feta cheese if desired and serve!
