Those Green Dragon meatballs are lovely! I have that recipe too.
I make meatballs and serve in a tomato sauce with spaghetti:
For the meatballs:
500g beef mince
2 rashers of smoked bacon
one onion
one pepper (any colour you like)
one chilli (optional)
garlic (as much as you like)
dried oregano
salt & pepper
put everything except the mince into a food processor and blitz
add the mince and blitz again till everything is amalgamated
leave for about 20 minutes for the flavours to develop
tip out on to a chopping board/clean worktop and then form the mixture into meatballs the size of a walnut
put them into an oven tray/dish and bake in a hot oven until cooked - probably around 20-30 minutes.
keep an eye on them as they cook - initially they will release a fair amount of moisture, but when that is cooked off they can burn quite quickly.
Whilst they're cooking, make your tomato sauce and cook the spaghetti
Serve it all with lots of freshly grated Parmesan