harvesting overwintering onions

This winter has seen our biggest ever harvest of overwintering onions, all "radar" variety. We picked them at the end of last week and they are now stacked in wooden crates drying in one of our polytunnels, and are of good size. We've now found a way of growing them that works well for us - from sets planted at 20cm apart, through a mulch of greenwaste compost inside a windbreak, and kept well weeded over winter.