sentence: mix beef onion carrot parsley egg breadcrumbs and feta cheese in a bowl sentence: mix flour salt and pepper in a bowl sentence: coat the meatballs in flour sentence: cook the meatballs in a pan with oil sentence: heat olive oil an onion and garlic in a pot sentence: add tomato paste beef stock and diced tomatos to the pot sentence: add the meatballs to the sauce sentence: cook the pasta in boiling water sentence: add the meatballs to a plate of pasta and sprinkle parmesan cheese on top