Deglaze the pan you cooked the chicken in with wine or chicken stock. Reduce the liquid to an essence.
Add the butter to the pan with the released fond (sucs) and stir. If you feel chef-like, give the pan a swirl to keep the butter moving but stirring with a wooden spoon will accomplish the same end result.
Continue cooking for a couple/few minutes until the butter is golden brown and gives off a wonderful, nutty fragrant smell. Be careful not to overcook the butter. You want it brown, not burn.
Add the sage, roasted almonds and white wine vinegar being careful not to let the vinegar splatter. Continue cooking for 45 seconds, taking note to keep stirring. At this point, the sauce should be smelling amazing.
Remove the pan from the heat, taste and adjust seasoning with salt and pepper.
Serve on top of the chicken, fish, or pork for an amazing meal.