Hi. I spent last thursday doing the same and it is great. We have potato, carrot and parsnip, although like you ran out of pots.
I used an ice cube tray but Nathan eats so much I think he'll need 4 cubes at least at a time, so I also used tommee tippee food pots and some individual size jelly moulds!!
He has Parsnip and potato today and loved it. I'm really looking forward to trying some green veg out on him in the next couple of weeks.