Cook the pasta in boiling salted water according to the instructions on the packet. Peel and halve the onions and cut them into slices. Heat oil in a frying pan. Fry meat for 3 minutes on each side.
Fry the onion briefly. Season with salt and pepper and deglaze with vinegar. Remove meat and onions from the pan and keep warm. Pour broth into the pan and let it simmer down. Wash, clean, halve, core and dice the chilli pepper.
Add cream and chilli pepper to the stock, season with salt and pepper if necessary. Arrange spaghetti, meat, onion and sauce on plates. Place a blob of redcurrant jelly on each plate. Garnish with parsley leaf and chilli pepper.