Creating Simple Chicken Breast with Onions and Tomatoes is straightforward with these simple steps:

1. Prepare Ingredients: Begin by slicing the onions and halving the cherry tomatoes. Mince the garlic and set aside.
2. Heat Oil: In a large skillet, heat the olive oil over medium-high heat.
3. Cook Chicken: Season the chicken breasts with salt and pepper. Add to the skillet and cook for 5-7 minutes on each side, until golden brown and cooked through. Remove the chicken from the skillet and set aside.
4. Sauté Onions and Garlic: In the same skillet, add the sliced onions. Sauté for about 3-4 minutes until they become translucent. Add in the minced garlic and cook for another minute until fragrant.
5. Add Tomatoes and Oregano: Mix in the halved cherry tomatoes and dried oregano. Cook for an additional 2-3 minutes until the tomatoes start to soften.
6. Return Chicken to Skillet: Place the cooked chicken breasts back in the skillet and pour any juices over them. Allow everything to simmer together for 2-3 minutes to meld the flavors.
7. Garnish and Serve: Once everything is heated through, remove from the heat. Garnish with fresh basil if desired before serving.

By following these easy steps, your Simple Chicken Breast with Onions and Tomatoes will be ready to enjoy in no time!