STEP 1
Heat some olive oil in a pan. Add the onion and tomato pieces and sauté.
STEP 2
Add some vegetable broth and stir briefly.
STEP 3
Add the capers and olives.
STEP 4
Fry the meatballs separately in a pan and then add them to the sauce.
STEP 5
Cook the spaghetti according to the instructions on the package and serve with the sauce.