Pesto-Stuffed Chicken with Tomato Relish

This Pesto-Stuffed Chicken with Tomato Relish is a bright, weeknight-friendly dinner that feels special enough for company. Juicy, thinly pounded chicken breasts get a ribbon of herby pesto and a blanket of gooey mozzarella, then pan-roasted until golden. A quick tomato and balsamic relish adds fresh acidity and color to each bite. The method is simple, the flavors are balanced, and the whole dish comes together in about 35–40 minutes.

Pesto-Stuffed Chicken with Tomato Relish is perfect when you want something impressive without hours in the kitchen. The crisped exterior, melty cheese, and vibrant tomato topping make every forkful sing. Below you’ll find an ingredient list, clear step-by-step instructions rewritten for ease, and serving tips to get the most from this recipe.

Ingredients

• ▢2 cups pesto sauce — click link for easy recipe
• ▢2 cups tomatoes, seeded and chopped
• ▢1 tablespoon extra-virgin olive oil
• ▢2 tablespoon balsamic vinegar
• ▢Kosher salt and black pepper
• ▢2½ lbs chicken breasts, boneless, skinless, pounded to ⅛th-inch in thickness
• ▢Kosher salt and black pepper
• ▢2 cups mozzarella, whole milk, shredded
• ▢2 tablespoon olive oil
• ▢Cooking spray

Make-Ahead Notes

You can make the pesto up to 3 days ahead and keep it chilled. The tomato relish will hold for a day in the refrigerator, but it’s brightest served within a few hours of assembling. If you pound and portion the chicken ahead of time, store it covered in the fridge and stuff just before cooking.

Equipment

• Cutting board and chef’s knife
• Meat mallet or rolling pin and a sheet of plastic wrap
• Large skillet (ovenproof if you plan to finish in the oven)
• Small bowl for the relish
• Tongs and a spatula
• Meat thermometer (optional but helpful)

Flavor and Texture Notes

The pesto brings basil, garlic, and nutty cheese notes while the balsamic in the tomato relish gives a sweet-tangy counterpoint that cuts through the richness of the mozzarella. Pounding the chicken very thin ensures even cooking and a delicate bite that holds the filling without becoming tough.

Step-by-Step Instructions

Below are clear, rewritten directions that preserve the order and ingredient amounts from the original list. Follow them exactly for best results.

1. Prepare the tomato relish: In a small bowl, combine 2 cups tomatoes (seeded and chopped), 1 tablespoon extra-virgin olive oil, and 2 tablespoon balsamic vinegar. Season with kosher salt and black pepper to taste. Stir to combine and set the relish aside to let the flavors meld while you prepare the chicken.
2. Prep the chicken: Place each of the 2½ lbs chicken breasts between two pieces of plastic wrap. Use a meat mallet or rolling pin to pound the breasts to an even thickness of 1/8th inch. Season both sides lightly with kosher salt and black pepper.
3. Assemble the stuffed breasts: Lay a pounded chicken breast flat on your work surface. Spread a thin, even layer of pesto sauce — using portions from the 2 cups pesto sauce — across one half of the breast, leaving a small border at the edge. Sprinkle about 1/8 of the total 2 cups mozzarella (shredded whole milk) over the pesto. Fold the other half of the chicken breast over the filling to create a sealed pocket. Repeat with remaining breasts, using the remaining pesto and mozzarella divided evenly across them. If needed, secure the edges with kitchen twine or toothpicks.
4. Heat the pan: Add 2 tablespoon olive oil to a large skillet and warm it over medium-high heat until shimmering. Lightly coat the top of each stuffed chicken breast with cooking spray (or brush very lightly with olive oil) to encourage browning and prevent sticking.
5. Sear the chicken: Place the stuffed breasts in the hot skillet seam-side down. Sear without moving for 3–4 minutes, or until the bottom side is golden brown. Flip carefully with tongs or a spatula and sear the other side for another 3–4 minutes.
6. Finish cooking: Lower the heat to medium, cover the skillet with a lid, and continue cooking for 6–8 minutes more, flipping once about halfway through. Cook until the chicken reaches an internal temperature of 165°F (74°C) at the thickest part or until juices run clear and mozzarella is melted. If your skillet is ovenproof and you prefer, you may transfer it to a preheated 375°F oven for 8–10 minutes instead of covering on the stovetop.
7. Rest the chicken: Transfer the cooked stuffed breasts to a cutting board and let them rest for 5 minutes. This pauses carryover cooking and helps the juices redistribute for juicier slices.
8. Plate and top with relish: Remove any toothpicks or twine, slice the stuffed breasts if desired, and spoon the tomato relish over each piece. Finish with a light crack of black pepper and a pinch of kosher salt if needed.

Tips for Success

• When pounding the chicken, aim for uniform thickness so cooking is even. 1/8th inch gives a delicate, almost crepe-like finish that’s easy to roll or fold.
• Because the cheese is whole-milk mozzarella, it melts beautifully; keep an eye on the cooking time to avoid overcooking the chicken while getting the cheese ooey-gooey.
• If you don’t have pesto on hand, use store-bought for convenience or make a quick batch with basil, garlic, olive oil, Parmesan-style cheese, and toasted pine nuts or walnuts.
• Seeds in tomatoes can add moisture. Removing the seeds before chopping helps keep the filling and pan from getting watery.
• Leftovers keep well in the refrigerator for 2 days. Reheat gently in a 325°F oven until warmed through to avoid drying out the chicken.

Serving Suggestions

This Pesto-Stuffed Chicken with Tomato Relish pairs beautifully with simple sides that let the stuffing shine. Try it with a lemony arugula salad, garlic roasted potatoes, or a bed of herby couscous. A crisp white wine or sparkling water with a lemon twist is an easy, refreshing match.

Quick Weeknight Shortcut

Short on time? Use thin-cut chicken cutlets instead of pounding thick breasts. Assemble and sear as directed; they’ll cook a bit faster—check doneness early. You can also prep the relish in the morning to save minutes at dinner time.

Nutrition Snapshot (Approximate per serving)

Calories and macros will vary based on portion size and the exact pesto recipe you use. Expect a balance of protein from the chicken, healthy fats from the pesto and olive oil, and fresh carbohydrates from the tomato relish.

Final Notes

This Pesto-Stuffed Chicken with Tomato Relish strikes a lovely balance between rustic and refined. The herbaceous pesto and melting mozzarella are comfortingly familiar, while the tomato-balsamic relish adds brightness that keeps each bite lively. With straightforward steps and pantry-friendly ingredients, this recipe is one to keep on repeat.