Gravy.

Citizens. Do not... under any circumstances... wash that pan. Look at it. The black iron. The brown residue left by the beef. It looks like mess. But to the educated eye... It is liquid gold. We call this... The Fond. And we are going to reclaim it. The heat is still on. Pour in the wine. Red. Robust. A generous splash. Hear the violent hiss? Good. Take a wooden spoon. Scrape the bottom. Dislodge every atom of flavour. Let it bubble. Let it reduce. We are looking for a syrup... not a soup. Add the stock. Beef stock. Dark as a winter night. Pour it in. Bring to a boil. Then... simmer. Patience returns. Watch the bubbles change size. From frantic splashing... to slow, glossy pops. It is thickening. It is becoming... Gravy. The final touch. Remove from the heat. Take a single cube of cold butter. Yes, more butter. Whisk it in. Vigorously! This gives us the shine. The gloss. The velvet texture. Pour it. Through a sieve if you must be fancy. But pour it over the steak. Not the potatoes. The potatoes are for dipping. There you have it. Alchemy. Carry on.