Recipe: Chicken in a creamy mushroom sauce, with caramelised greens

This is one of the simplest "posh" recipes that i've made in ages- I was really impressed with the end result. I wanted to perfect a creamy white wine and mushroom sauce recipe, and I wanted to make the most of my homegrown leeks, and so this dish sorta 'came together'. Some people just like their cabbage/leeks steamed slightly with a bit of butter, or stir fried, but I really like to cook them for ages until they begin to go golden- cause it brings the natural sweetness out and turns what we consider as simple green vegetables into something so scrumptious! Important to note: with this recipe, you will usually end up with a fair amount of the creamy sauce left- but don't worry, it is a fairly versatile sauce, and goes particularly well mixed into pasta, or served with other types of meats (pork, turkey etc.)

Chicken in a creamy mushroom and white wine sauce, served with caramelised leeks and cabbage (serves 2)

The Chicken
Olive oil
2 chicken breasts
Salt and pepper
1 tsp dried rosemary

The leeks/cabbage
1 tbsp olive oil
30g butter
¼ small white cabbage, sliced
2 large or 3 medium leeks, sliced
1 tsp sugar
Salt and pepper

The mushroom sauce
1 tbsp oil
30g butter
1 small onion or banana shallot, finely diced
2 cloves garlic, crushed
75g diced white mushrooms
25g diced shitake mushrooms
100ml white wine
100ml chicken stock
200ml double cream
Salt and pepper to taste

1. Preheat the oven to 200C. Put the two chicken breasts in a roasting tray with the oil, rosemary, seasoning, and a little bit of water (to prevent the chicken from drying out). Put in the oven for 30 minutes.
2. Meanwhile, in a saucepan on a medium heat, cook all of the leek/cabbage ingredients, covered, for 10 minutes. Remove the lid then cook for a further 10 minutes, stirring often.
3. Meanwhile, start making the sauce. In a large deep frying pan, sautee the onion and garlic in the oil and butter for 5 minutes, until softened.
4. Add the white wine and cook for a further 3 minutes. Add the cream and stock, and cook for a further 7 minutes, stirring often, until the sauce has become nice and thick. Season to taste.
5. Remove the chicken from the oven, slice up and arrange on the plate, spoon over some of the mushroom sauce, and serve with the leeks and cabbage on the side.