Season the chicken thighs generously with salt and pepper. Heat the olive oil over medium heat in a skillet, adding chicken thighs to brown on both sides for about 5-7 minutes.
Pour in the heavy cream and sprinkle mixed herbs over chicken. Allow to simmer gently for 10-15 minutes.
Boil chopped potatoes in a separate pot until tender, about 15-20 minutes. Drain and mash with butter, salt, and pepper until smooth.
Spread chopped carrots on a baking tray, drizzle with olive oil, salt, and pepper, and roast for about 20 minutes.
To serve, place mashed potatoes on each plate, top with chicken thigh and sauce, and arrange roasted carrots on the side.
Notes
This dish keeps well in the refrigerator for up to 3 days. Reheat gently on the stovetop or microwave.