In a large pan, sauté the guanciale very gently in a drizzle of olive oil (or a small dab of lard) until it has lightly browned and rendered most of its fat.
Add the spring onions and sauté for a minute or two, until soft and translucent.
Add the artichoke wedges to the pan, mix them with the onion and sauté gently for a minute. Then add a small ladleful of water and let them simmer for 5 minutes or so, until semi-tender.
Now add the fava beans and (if using fresh) the peas, season with salt and pepper, mix, and sauté for another minute.
Add ladleful or two of water, enough to almost cover the vegetables. Cover and simmer gently for another 5 minutes.
Now uncover the pot and add the mint and (if using frozen) the peas, mix, and simmer uncovered until the vegetables are perfectly tender but not mushy. There should still be a fair amount of liquid in the pan.