Finely chop the onion, and slice the garlic.
Heat the oil in a wide saucepan and gently sauté the onion and garlic until soft. Add the chill flakes and paprika and fry for a few seconds, then add the tomatoes. Simmer gently for 15 minutes.
Drain then rinse the beans and stir in the sauce. Season with salt and pepper. Bring to the boil, then add the squid. Cover the pan with a lid and gently simmer for 5 minutes.
When the squid is cooked, add the olives, stir for a minute then mix in the chopped parsley leaves. Taste and adjust the seasoning to your liking.
Serve with a squeeze of lemon juice and a pinch of lemon zest.