So I had all this medium rare beef from yesterday, no one else in the family likes red meat, what should I do? I do not have time to eat a kilo myself before the meat gets bad. A nice solution, "Biff Rydberg" / Beef Rydberg. A Swedish classic from the 19th century, a slightly more luxurious variant of our "Pytt-i-Panna". Raw fried potatoes, onions and beef, fried again. Served with a mustard cream made from lightly whipped cream, mustard powder, sugar, onion powder, black pepper and salt. Not traditional without an egg yolk. A simple dish but requires perfection for awesomeness!