Using a cast iron skillet, saute olive oil, garlic, and onion for 5 minutes on medium heat.
Sprinkle salt and pepper on each side of all chicken breasts, in the same skillet, pan fry each side for 7-10 minutes until cooked all the way through and browned.
While the chicken is cooking, stir onions and garlic every few minutes so they caramelize without burning. Add soup and halved tomatoes to the skillet and cook for an additional 5 minutes. Remove from heat and add basil right before serving.
This nutritional information refers to each serving of the entire recipe and not just the products used as ingredients.