First make the sauce: heat the oil in a large frying pan and fry the onions and red peppers for about 5 mins, until starting to soften. Add the garlic and fry for another minute.
For the meatballs, combine the turkey mince, onion, oregano and mix well with your hands. Tip in enough breadcrumbs to allow the mixture to bind. With damp hands, roll the mixture into little balls until it is all used up, makes about 16.
Heat about 2tbsp olive oil in a frying pan and fry the meatballs in two batches for about 15 mins until cooked, turning frequently to brown all over.
Reheat the red pepper sauce in a saucepan and add the meatballs to warm through.
Meanwhile cook the spaghetti according to the packet instructions. Drain the spaghetti and divide between four bowls. Spoon the sauce and meatballs on top and serve with a little grated Parmesan if liked.
Notes
When adding the breadcrumbs, remember you may not need all of them - just enough to make the mixture bind.