Pound each chicken breast between plastic wrap or waxed paper with flat side of mallet to 1/4-inch thickness.
Sprinkle chicken with 1/2 teaspoon of garlic powder.
Coat a 10-inch skillet with nonstick vegetable spray. Heat olive oil over medium heat.
When hot, add chicken and cook for 5 minutes until light brown.
Add tomatoes, remaining 1/2 teaspoon garlic powder, basil, parsley, and pepper.
Reduce heat to low; cover and simmer for 20 minutes