Preheat a large frying pan or skillet on high.

Form beef into 2 patties.

Sprinkle a scant teaspoon salt on the hot pan and place burgers on top.

Sear burgers for about 4 minutes on each side. Remove meat and rest on 2 warm dinner plates.

Add wine and tomato paste to the pan. Simmer for a minute or so, stirring to scrape up and burger bits into the sauce.

Stir in butter until melted. Taste and season sauce.

Serve burgers with sauce poured over and green salad on the side.