Chicken with Grainy Mustard Sauce

2 boneless chicken breasts
6 rashers of streaky bacon
250 g spinach leaves
60 g firm goat's cheese
2 tbsp olive oil
200 ml stock
200 ml white wine
4 heaped tbsp -->crème fraîche
1 heaped tsp wholegrain mustard

Flatten each breast to 1 time it's original width. Stretch 3 bacon rashers on a board into rectangle. Lay a breast on top, repeat with remaining bacon and chicken. Cover each with 4 spinach leaves, put cheese cubes in the middle. Season with pepper. Roll each one up, secure with cocktail sticks.
Heat half the oil in a frying pan. Cook the chicken over a high heat for 3-4 minutes until golden, turn, cook for 3-4 minutes more. Add stock and wine. Simmer for 20 min., turning chicken halfway. Remove chicken, stir in crème fraîche and mustard.
Heat remaining oil in a large pan, add remaining spinach, season. Cover and cook for 2 minutes to wilt the spinach.