01 - Pat the chicken breasts dry with paper towels. Season both sides generously with salt and freshly ground black pepper.
02 - Heat olive oil in a large skillet over medium-high heat. Place chicken in the pan and sear for 5–6 minutes per side until golden brown and cooked through, reaching an internal temperature of 165°F. Remove chicken to a plate and tent loosely with foil to keep warm.
03 - Reduce heat to medium. Add the chopped shallot to the same skillet and sauté for 2 minutes until softened and fragrant.
04 - Add blueberries, thyme leaves, chicken broth, balsamic vinegar, and honey to the skillet. Stir to combine and simmer for 5–7 minutes, allowing blueberries to burst and the sauce to reduce slightly.
05 - Stir in the unsalted butter until melted and the sauce becomes smooth and glossy.
06 - Return the chicken to the skillet, turning to coat evenly with the blueberry-thyme sauce. Simmer for 1–2 minutes to heat through. Serve immediately topped with extra sauce and fresh thyme sprigs.