Trim and wash the leeks well to remove any dirt.
Place in a pot and add the wine, water, EVOO, garlic, thyme, seasoning and bring to the boil.
Turn down to a low simmer and cook until tender, about 45 minutes.
Cool in the liquid.
While the leeks are cooking blanch the peas in lightly salted water for 1 minute, refresh in ice water.
Drain well and crush in a bowl with a fork.
Add the feta and mint and dress with olive oil, lemon juice and seasoning.
Remove the leeks from the cooking liquid, cut into 3 or 4 pieces and divide between plates. Spoon the pea salad amongst the plates.