Cut the chicken thighs into 1-inch chunks for even cooking and browning. Season the chicken pieces generously with kosher salt and black pepper on all sides—this helps develop a flavorful crust when seared. Mince the garlic cloves fresh to release their aromatic oils, mince the shallot, slice the peaches into 1/2-inch wedges, and julienne the fresh basil. Having everything prepped before you start cooking ensures smooth workflow and prevents overcooking any component.

Heat the olive oil in a large oven-safe skillet over medium-high heat until it shimmers. Working in batches if necessary to avoid crowding the pan, sear the seasoned chicken chunks for 5 minutes per side until they develop a golden-brown crust. This browning creates depth of flavor through the Maillard reaction. Transfer the seared chicken to a clean plate and set aside.

In the same skillet, melt the butter over medium heat and add the minced shallot. Sauté for about 2 minutes until softened and fragrant, then add the fresh minced garlic and cook for just 30 seconds to bloom its flavors without burning. I like using high-quality butter like Kerrygold because it adds richness and a beautiful color to the finished sauce.

Add the peach preserves, chicken broth, honey, Dijon mustard, thyme, red pepper flakes, and soy sauce to the skillet with the aromatics. Stir everything together until well combined and bring to a gentle simmer over medium heat. Let it cook for about 2 minutes, stirring occasionally, until the sauce thickens slightly and the flavors meld together. The soy sauce adds umami depth that complements the sweet peach and poultry beautifully.

Return the seared chicken from Step 2 to the skillet and add the sliced peach wedges from Step 1, nestling them into the sauce. Stir gently to coat everything evenly. Heat the oven to 375°F, then transfer the skillet to the oven and bake for 15-20 minutes until the chicken reaches an internal temperature of 165°F when tested with a meat thermometer. The gentle oven heat ensures the chicken stays tender while the peaches soften and the sauce reduces slightly.

Remove the skillet from the oven and let it rest for 2 minutes to allow the residual heat to distribute evenly. Divide the chicken and peaches among serving plates or bowls, generously spoon the sauce over each portion, and top with the julienned fresh basil. The fresh basil adds a bright, aromatic contrast to the rich, sweet sauce and ties all the flavors together beautifully.