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Roast beef and caramelised onion toasties
More effort
Prep:
Cook:
This is a fantastic way to use good quality leftover roast beef. It’s well worth taking the time to caramelise the onions properly so you get the very best rich, deep flavour to complement the meat.
Skip to ingredients
For the caramelised onions
- 2 brown onionsfinely sliced
- 1 tbsp butter
- 1 tbsp sunflower oil
For the toastie
- 300ml gravy(can be made up with 4 heaped tsp gravy granules)
- 150g roast beef
- 1 tsp English mustard
- 1/2 tbsp softened butter
- 40g Lidl extra mature cheddargrated
- 20g stiltoncrumbled
- 4 slices of crusty breadwe used Lidl wheat and rye
- 1 tsp sunflower oil
Method
step 1
Slowly cook the onions in the oil and butter in a heavy based saucepan over a medium/low heat for around 25-30 mins or until soft, deeply golden and have cooked down by well over half. Season with salt and set aside.
step 2
Heat the gravy in a saucepan and add the cooked roast beef slices until fully heated through, around 3 mins. Meanwhile make up 2 sandwiches spreading them with mustard, a layer of caramelised onions, the cheeses and then add in the roast beef, reserving the gravy. Carefully press the sandwiches down to seal.
step 3
Lightly butter the outside of the sandwiches then heat the sunflower oil in a frying pan. Fry the sandwiches for around 5 mins turning half way through and pressing down with a pan lid or spatula. Once the outside of the sandwiches are golden and the cheese has melted take them off the heat.
step 4
Cut the sandwiches in half to serve and have the reserved the gravy on the side for dipping.
Additional tips
step 6
If you want to roast the beef joint - we used the 2.2kg Deluxe Aberdeen Angus Beef Joint (Wet Aged). Ensure the beef has fully defrosted if frozen. Sear it on all sides in a hot pan, this should take around 10 mins. Remove from the heat and mix together 1.5 tbsp English mustard, 2 tbsp olive oil and a generous grating of black pepper and a good pinch of salt. Brush this mixture all over the joint.
Heat oven to 180/160c fan/ gas 4. Roughly chop 2 carrots, 2 onions and 2 celery sticks into large pieces and spread on the base of a roasting tray. Put the prepared beef on top and roast for 1 hr 30 mins or until the internal temperature has reached 40C. Remove from the oven and leave to rest for 20-30mins before slicing and serving. Use the resulting liquid in the tin for your gravy. Cover and chill any leftover beef so it can be used in this toastie!
