Preheat your oven to 350º F. This step is crucial as a properly heated oven ensures your chicken cooks evenly.
Drizzle olive oil into a medium sauté pan or a large skillet over medium-high heat. This will create a base for your other ingredients.
Add the sliced onion and diced garlic to the pan. Sauté until the onions just begin to become tender, about 3 to 5 minutes. You want them to be translucent and fragrant.
Stir in the canned diced tomatoes and black olives. Mix well to combine everything. The juices from the tomatoes will add moisture and flavor to the dish.
Arrange the chicken breasts in the pan, making sure they are nestled among the vegetables. This allows the chicken to absorb all those delicious flavors.
In a small bowl, mix together the kosher salt, paprika, ground cumin, and ground black pepper. Sprinkle this mixture evenly on top of the chicken.
Place the pan into your preheated oven. Bake until the juices of the chicken run clear when pricked with a sharp knife, which should take about 25 to 30 minutes. This step is essential for ensuring the chicken is cooked through.
Once done, remove the pan from the oven and let it rest for a few minutes. This helps the juices redistribute within the chicken, keeping it moist.
If desired, sprinkle fresh parsley over the top before serving for a pop of color and flavor. It adds a fresh note that brightens the dish.