1-First Step: Prepare the Marinade and Chicken Start by gathering all your ingredients for an easy mise en place. In a zip-top bag, combine 1 tablespoon olive oil, 1 tablespoon white wine vinegar, 3 cloves minced garlic, ¼ to ½ teaspoon red pepper flakes if you like spice, ½ teaspoon Italian seasoning, and a pinch of salt and pepper. Add the 1 ¼ pound boneless skinless chicken breasts, seal the bag, and massage it to coat the chicken evenly. Let it marinate for 10-15 minutes at room temperature, or up to 2 hours in the fridge for deeper flavor. This step ensures the chicken absorbs the seasonings while staying tender and juicy.

2-Second Step: Preheat the Oven and Prep the Baking Dish While the chicken marinates, preheat your oven to 425°F with the rack in the center. Place 2 tablespoons melted butter in a baking dish and let it melt in the oven for a minute or two just keep an eye on it to avoid burning. In the dish, mix together 3 cups halved cherry tomatoes, 2 tablespoons white wine vinegar, the remaining 2 tablespoons melted butter, ⅓ cup prepared basil pesto, 4 cloves minced garlic, 3 tablespoons chopped fresh basil, ½ teaspoon onion powder, and more salt and pepper to taste. Stir everything well to create a flavorful base for your Italian Chicken Basil Pesto Grape Tomatoes.

3-Third Step: Arrange and Bake the Dish Once the oven is ready, arrange the marinated chicken in the center of the baking dish, surrounded by the tomato mixture. Make sure the tomatoes are around the edges to roast nicely and release their juices. Bake uncovered for 18-25 minutes, depending on the thickness of your chicken breasts. Check for doneness around 20 minutes; the chicken should be nearly cooked through with an internal temperature of about 160°F, as it will continue cooking in the next step. For vegan swaps, use tofu instead and reduce the bake time by 5 minutes to prevent it from drying out.

4-Fourth Step: Add Cheese and Finish Cooking In the last 5 minutes of baking, sprinkle 1 ½ cups shredded mozzarella cheese over the chicken for a melty topping. If you’re opting for a dairy-free version, skip this or use a plant-based cheese alternative. Switch to broil for a quick 1-2 minutes to bubble the cheese, but watch closely to avoid over-browning. If you’re not using cheese, just bake until the chicken reaches 165°F internally. Let the dish rest for 5 minutes before serving to lock in juices and ensure food safety, especially important for families with kids.

5-Final Step: Serve and Enjoy Once out of the oven, sprinkle extra fresh basil or parsley on top for a pop of color and flavor. Pair your Italian Chicken Basil Pesto Grape Tomatoes with sides like pasta, rice, or veggies to soak up the sauce. For adjustments, if using chicken thighs, add 2-3 more minutes to the bake time, and for lower-oil options, reduce the butter and rely on the pesto’s natural fats. This step completes your basil pesto chicken with tomatoes, making it a versatile meal that hits the spot every time. Remember, always use a meat thermometer to check that the chicken is safely cooked to 165°F.