For an incredible meal that impresses without complexity, follow these steps to prepare your Simple Chicken Breast with Onions and Tomatoes:

1. Prepare the Chicken: Begin by seasoning the chicken breasts with salt, pepper, and dried oregano on both sides.
2. Heat the Oil: In a large skillet, heat the olive oil over medium heat until shimmering, about 1-2 minutes.
3. Sear the Chicken: Place the seasoned chicken breasts in the skillet, cooking for about 5-7 minutes on each side, or until golden brown and cooked through. Remove from the skillet and set aside.
4. Sauté Onions: In the same skillet, add the sliced onions. Cook for about 5 minutes until they begin to soften and turn translucent.
5. Add Garlic: Stir in the minced garlic and cook for another minute until fragrant.
6. Incorporate Tomatoes: Add the halved cherry tomatoes and stir well. Cook for an additional 5-7 minutes until the tomatoes burst and create a sauce.
7. Combine Ingredients: Return the chicken to the skillet, spooning some of the tomato-onion mixture over the top. Let it simmer for 2-3 minutes to meld flavors.

This step-by-step guide will lead you to create an incredible dish that not only looks appealing but also bursts with flavor!