Heat olive oil in a large skillet over medium heat.
Season chicken breasts with black pepper and onion powder.
Add chicken to the skillet and brown on both sides for 3-4 minutes each.
Pour in the canned chopped tomatoes (reserve half the liquid), chicken broth, and water.
Stir in frozen mixed vegetables.
Cover and simmer on low heat for 20-25 minutes, until chicken is cooked through.
Adjust seasoning with salt and pepper to taste.
Serve hot, optionally with naan bread or your favorite side.