Mush the pork and beef mince together with your hands.
It should look something like this. Add salt and pepper for seasoning.
Finely chop your red onion and add to meat mixture.
Mush together with your hands and then add one egg to bind the mixture together. Mush again to mix the egg in with the meat.
Take a small portion of the mixture, and place a pinch of flour on your palm. Roll it together to make a small ball like this.
Make all of your meat mixture into small balls like this and lay out on a chopping board ready to cook.
Add a knob of butter to a frying pan, wait until the butter turns golden brown then add your meatballs.
Toss them in the pan until they're brown and the meat is cooked through.