Follow these step-by-step instructions to create your Simple Chicken Breast with Onions and Tomatoes:

1. Prep the Chicken: Pat the chicken breasts dry with paper towels. Season both sides with salt and pepper.
2. Heat the Oil: In a large skillet, heat the olive oil over medium heat.
3. Cook the Chicken: Add the chicken breasts to the skillet. Sear for about 5-6 minutes on each side, until golden brown and cooked through. Remove the chicken from the skillet and set aside.
4. Sauté the Onions: In the same skillet, add the sliced onions. Sauté for 3-4 minutes until they begin to soften.
5. Add Garlic: Stir in the minced garlic and cook for another minute, being careful not to burn it.
6. Incorporate Tomatoes: Add the chopped tomatoes and dried oregano to the skillet. Stir well to combine, and allow the mixture to cook for 5 minutes until the tomatoes soften and release their juices.
7. Return the Chicken: Nestle the cooked chicken breasts back into the skillet. Spoon some of the tomato-onion mixture over the chicken.
8. Simmer: Cover the skillet and allow everything to simmer for an additional 5 minutes, letting the flavors meld together.
9. Garnish and Serve: Remove from heat and serve hot, garnished with fresh basil leaves if desired.

This straightforward sequence ensures that you create a wholesome, flavorful dish without any fuss. You’ll be amazed at how such simple steps can yield something so delicious!