Ok, so that's probably not what most people want their onion to do but at least it listened. On top of that they were given to me in a bundle that was already drying out and I waited an extra week to plant them.
They turned out to be about the size of tennis balls or a little smaller but the taste is superb! I'm going to make another box just for onions next year and plant them on time. The garlic is just next to them I think, I hope, I fear I might be wrong... The yams on the other had are definitely in the last quarter of the box (2x2 area which really should be bigger for yams) and are flourishing. I know you would love a pic right now but, sorry, it's late and have to do a shop.
Next time I'll show you how to get it into an omlet!