Heat the olive oil in a large, flameproof shallow casserole dish over a medium heat, and cook the onion, fennel and garlic for 12 mins, stirring occasionally until soft and just turning golden. Stir in the nduja or chorizo and sizzle for 2 mins until the oils are released and the veg starts to take on the red colour.
Tip in the tomatoes, then rinse the can out with the wine and pour it in, along with the stock. Stir in the chickpeas. Season and bring to a simmer, then cook for 20 mins until the sauce is rich. Season to taste.
Stir in the squid and prawns so they’re completely mixed into the sauce, then simmer for about 5 mins more until the squid and prawns are cooked through. Scatter with the parsley, lemon zest and reserved fennel fronds before serving.
