To roast cherry tomatoes, pre-heat oven to 400 degrees. Line baking pan with an even layer of tomatoes and drizzle with olive oil, salt and pepper. Roast for 30 minutes; let cool.
In a medium bowl, combine brown rice with tomatoes, chickpeas, cucumber, scallions, corn, feta and olives.
Stir in lemon juice, zest, olive oil, oregano, mint, garlic, salt and pepper.