01 -
Preheat the oven to 180°C (350°F).
02 -
In a large frying pan over medium heat, warm the olive oil. Add chicken thighs, season with salt and black pepper, and sear on both sides until golden, about 5 minutes.
03 -
Remove chicken from the pan and set aside. In the same pan, add the crème fraîche, both mustards, and chopped fresh tarragon. Stir thoroughly and bring the sauce to a simmer.
04 -
Return the chicken thighs to the pan, cover, and simmer gently for 10 minutes.
05 -
Transfer everything to an ovenproof dish and bake for 25 minutes, or until the chicken is thoroughly cooked.
06 -
Serve hot, generously topped with the creamy mustard tarragon sauce.