- Preheat the oven to 200ºC/Fan 180ºC/ 400F / Mark 6.
- You will also need a 20 hole mini muffin tray (the hole measuring about 3cm).
- Sift the flour into a large bowl. Add the eggs & stir until combined. Add the milk & beat into a batter. Cover & leave to stand for 30 minutes.
- Sprinkle the peppercorns onto a clean chopping board & press the rump in the peppercorn. Place the whole rump on a baking sheet & drizzle with 1 tbsp oil.
- Roast for 15 minutes for medium rare. Remove & cover in foil to rest.
- Place the muffin tray on a baking tray & pour 1/4 tsp of oil into each of the muffin holes. Place in the oven for 5 minutes. Remove from the oven & immediately pour approx 1 tsp of the batter into each hole. Bake for 12 minute until puffed & golden brown.
- Meanwhile slice the beef very thinly. Remove the Yorkshire puddings from the tins. Top with the steak & spoon over the horseradish sauce and garnish with parsley.