4 garlic cloves, finely sliced
200g/7oz frozen chopped onions (or 2 medium onions, roughly chopped)
handful fresh flatleaf parsley leaves, roughly chopped (optional)
2 tbsp capers (from a jar), drained
2 x 400g tins chopped tomatoes
1 tsp dried chilli flakes
125g/4陆oz drained, pitted black olives, cut in half
300g/10陆oz dried spaghetti
freshly ground black pepper
4 tbsp olive oil
陆 tsp fine sea salt
150ml/5fl oz red wine or vegetable stock