Preheat the oven to 175 degrees Celsius (350 degrees Fahrenheit)
In a large cast iron skillet (or oven proof pan) heat the olive oil. Season the chicken thighs on both sides with salt and pepper and then cook for 4 minutes per side in the oil until golden in colour. Once cooked, transfer to a plate
In a bowl whisk together the mustard, honey and balsamic vinegar.
Add the diced shallots and garlic to the pan and cook for 4 minutes until the shallots begin to soften. Add in the sliced red onions and thyme and let cook for 3 minutes before pouring in the balsamic/mustard mixture and chicken stock.
Let everything simmer for 4 minutes before adding in the chopped kale. Return the chicken thighs to the skillet and arrange the fig pieces around the pan. Spoon some of the sauce over the chicken and then bake in the oven for 35 minutes until the chicken is cooked through. Sprinkle with more thyme before serving.