Dice the paprika and onion into small pieces.
Cut the beef into bite-sized pieces.
Add olive oil to a pan and stir-fry the beef.
Add the onion and paprika to the pan and cook together.
Pour in tomato sauce and a little water.
Boil the spaghetti noodles and rinse under cold water.
Add the noodles to the pan and mix well with the sauce.
Season with salt and pepper.
Plate the dish and garnish with parsley to finish.