Get a pan of water on to boil for your pasta.
Add olive oil to a heavy-based pan on a medium heat followed by your onions and garlic. Gently fry for 3-4 minutes until soft and translucent.
Add your minced anchovy, stir and continue to fry until the onions are starting to turn golden. Add more oil if needed to ensure your onions don’t stick.
Once the onions are golden add your tomatoes and give them a good stir then leave them to simmer for a few minutes. Meanwhile cook your pasta in the pan of boiling, salted water.
Add a ladle of pasta water to your onions and tomatoes. Give it a good mix. Add the oregano and tomato purée followed by the second ladle of pasta water. Give everything a good mix.
When your sauce reduces to a silky consistency add your courgette and olives. Cover and leave to cook for 2-3 minutes. You want your courgette to have a little bite when you serve so keep an eye on it, this last bit comes together quickly.
Drain your pasta, remove the lid from the sauce and fold the pasta through.
Serve with grated pecorino and a sprinkle of caper berries.