Remove and discard the head and insides of calamari,including cartilage,then rinse well under cold running water.
Use a sharp knife to open out body lengthways. Scrape out and discard membrane,then score flesh lightly in a cross-hatch pattern and cut into strips.
Combine calamari,50 millilitres of olive oil,eschallot,garlic,spices and three-quarters of the lemon juice in a bowl and marinate for 20 minutes.
Place chickpeas in a pot,cover with cold water,bring to the boil then reduce to a simmer and cook until tender.
Drain,place in a bowl,add 2 tablespoons lemon juice and 1 tablespoon olive oil,then taste for seasoning. Heat remaining olive oil in a frying pan over medium-high heat,add chorizo and cook,turning once,until crisp (2-3 minutes).
Add to chickpeas and return pan to heat.
Drain squid from marinade,add to pan and cook quickly until squid just turns opaque (1-2 minutes),then add to chorizo mixture.
Add marinade to pan,cook briefly until eschallot is tender (1-2 minutes),season to taste,then pour over squid and chorizo mixture. Add parsley,mint and vinegar,toss to combine and serve immediately on a plate with rocket.