BEEF RYDBERG A LA SARAH
Step 1 Pre heat oven to 190′C/ fan 170′C.
Step 2 Melt the butter in a frying pan and gently sauté the onions for 10 mins until soft. Place in the bottom of a buttered gratin dish.
Step 3 Meanwhile peel and slice the potatoes and put in salted, boiling water for 5 mins over a high heat. Drain and empty over the onions. Don’t worry about how they look just shake the gratin dish to spread them evenly around the dish.
Step 4 Meanwhile mix the double cream, mustards and seasoning in a bowl. Pour over the potatoes and onions.
Step 5 Pop into the oven uncovered for 40 minutes until golden and bubbling.
Step 6 Heat the oil in the frying pan over a high heat then sear the diced beef fillet for two minutes on one side. Turn and repeat. Remove from the heat and season to taste.
Step 7 Serve the meat alongside big spoonful’s of the gratin and a raw egg yolk in its shell.