Remove the tentacles from the calamari and chop finely. Rinse the calamari (inside and out) in cold water, pat dry.
Without adding any oil, toast the pine nuts in a non-stick frying pan until golden brown, set aside. Heat the oil in the same pan, add the garlic and chopped tentacles, sauté for approx. 5 mins.
In a bowl, combine the lemon zest and juice with 2 tbsp of the oil. Add the tentacles, pine nuts, breadcrumbs, sultanas, parsley and chilli pepper, mix, season. Transfer the filling to a disposable piping bag, cut off a large tip, fill the calamari with the mixture. Flatten the calamari a little, seal each with a toothpick, brush with the remaining oil.
Grill the calamari over/on a very high heat (approx. 250°C) for approx. 2 mins. on each side, season with salt. Serve the calamari with the slices of lemon.