Tarragon Chicken - Rest Less

Ingredients

• 4 x 125 g (4oz) chicken breasts, cut into bite-size pieces
• 25 g (1oz) plain flour
• 2 tbsp olive oil
• 250 g (9oz) chestnut mushrooms, sliced
• 150 ml (5fl oz) white wine
• 300 ml (½ pint) crème fraîche
• ½ tbsp Dijon mustard
• 2 tbsp fresh chopped tarragon
• Large handful spinach