Melt butter on medium heat, and then add flour to it, stirring constantly.

Then add stock to it and cook this until little thick, stirring occasionally

Now Season the chicken breasts with salt and black pepper.

Melt 50g butter in a frying pan and saute the chicken for about 15 minutes.

Turn it once or twice until nicely cooked.
When the chicken is almost done, add the cream into the stock add lemon juice and mix well

Now plate the chicken with some veggies and pour the supreme sauce.