Place the marinade ingredients in a bowl or plastic bag, mix well, add the chicken thighs and leave to marinate in the fridge 2 - 3 hours.
Pre Heat the oven to 190C/170C Fan/Gas 5
Remove the Chicken from the marinade.
Heat the oil in a heat proof casserole over a medium heat. Add the chicken thighs and cook for a few minutes on each side until browned. Remove from pan and set aside.
Add the chopped sausages, if using, cook to lightly brown and remove from pan.
Add the shallots and garlic, cook for 2 minutes. Return the chicken thighs and sausages to the casserole and add the tomatoes, white wine, herbs, seasoning and bring slowly to a simmer.
Cover and cook in the preheated oven for approx 45 minutes or until the chicken is cooked.
When the chicken is cooked, prepare the gnocchi according to the instructions on the packet. Once cooked, heat the frying pan used to brown the chicken and saute the gnocchi for a few minutes, add to the chicken and gently mix through.
Sprinkle with the remaining fresh herbs and serve.