1kg/2lb 4oz mixed greens (such as dandelion leaves, wild garlic, nettles, sea beet, spear-leaved orache, sea arrowgrass, spinach, chard), washed and chopped
1 lemon, juice only
2 medium or 3 small onions, halved and sliced
20 turns black peppermill
olive oil, for greasing and brushing
2 free-range eggs
600g/1lb 5oz feta, crumbled or chopped
10 sheets filo pastry