Add 1 tablespoon of butter to hot pan and toss
Brown for several minutes. (do not salt it will
keep mushrooms from browning).
Once your mushrooms are as brown as desired,
add a big pinch of salt and pepper.
Add garlic and sauté for 3 minutes.
Add flour and cook for about 1 minute.
Add chicken stock, salt and pepper to taste.
Serve sauce over seared chicken.