Squid (aka calamari) cooks QUICK. Especially when they're cut in bite-size. They cook even quicker than prawns/shrimp! When squid is cooked, it curls up and the colour turns solid opaque white. Generally, 1 minute is more than enough to ensure it is fully cooked. So the key to adding flavour (caramelisation) is to cook squid on high heat (or over a hot bbq!) To learn about how long it takes to cook prawns/shrimp, I go into detail in this Easy Garlic Prawn Pasta recipe, including how to peel and devein prawns at home.