Step 1

Preheat the oven to 180°C.

Step 2

Season chicken with salt and pepper. Melt butter and oil in an ovenproof frypan (with lid) over medium heat. Cook chicken in batches for 2-3 minutes each side until golden. Set aside.

Step 3

Add onion to the frypan and cook over medium-low heat, stirring, for 3-4 minutes until softened but not coloured. Add the mushrooms and garlic, and cook for a further minute. Add flour, stirring well to combine. Add Maille Dijonnaise, wine, stock and tarragon, and bring to the boil, stirring continuously.

Step 4

Return chicken to pan, cover and transfer to oven for 10 minutes or until chicken is cooked. Remove chicken from pan and set aside, then place pan over medium-high heat and reduce the sauce for 1-2 minutes. Stir in creme fraiche and heat through. To serve, place each chicken piece on a serving plate, spoon sauce over the top and garnish with tarragon leaves.