Season chicken breasts generously on both sides with salt and pepper then place in the frying pan. Cook until golden brown on both sides and cooked through. Remove from the pan and set aside.
Melt the butter in the pan then add the mushrooms. Cook until golden brown all over.
Add the garlic and herbs and allow to cook for 30 seconds before adding the cream.
Add lemon juice, salt and pepper to taste and allow to come to a simmer. Simmer 5 minutes then add the chicken breasts back to the sauce. Simmer for another 5 minutes until the sauce has thickened and can coat the back of a spoon.
Sprinkle over chopped parsley (optional) and serve.