Preheat your oven to 200°C (392°F) and pat the chicken thighs dry with paper towels, ensuring the skin is as dry as possible for crisping.
Season the chicken generously with salt, pepper, and a sprinkle of chopped sage or thyme on both sides.
Heat your ovenproof skillet over medium-high heat and add a tablespoon of olive oil. Once shimmering, place the chicken skin-side down and sear for 5-7 minutes until the skin turns golden brown and crispy. Flip the pieces and cook for another 3 minutes.
Remove the chicken from the skillet and set aside. In the same pan, add the sliced shallots and apple slices. Sauté for about 5 minutes until they soften and develop a fragrant aroma, with the apples beginning to caramelize around the edges.
Pour in the white wine or chicken broth to deglaze the pan, scraping up any browned bits with a spatula. Allow the liquid to simmer for a minute or two until slightly reduced.
Nestle the seared chicken thighs back into the skillet among the apple and shallot mixture. Transfer the skillet to the preheated oven and roast for 25-30 minutes, until the chicken reaches an internal temperature of 75°C (165°F) and the juices run clear.
Remove the skillet from the oven and let the chicken rest for 5 minutes. Garnish with additional chopped herbs if desired, then serve hot, enjoying the crispy skin, tender meat, and caramelized apples.