Chicken with 40 cloves of garlic

My lockdown challenge is to let my boyf’s son choose something for me to cook and he is then our hunter gatherer as the prime shopper in the household.  This is from Nigella’s Kitchen, my absolute favourite of her books and I’m not really sure why I haven’t tried this before.  It was total deliciousness!  I had been worried about it as I’d thought that the lad had forgotten to get spring onions and so I used ordinary onions - he turned up in the kitchen half an hour before it was due to come out of the oven and said that the spring onions were in the bottom of the fridge - I lobbed them in anyway.  I really don’t think that the onion substitution made any difference.  Whilst this is not the best looking dish, it was just lovely.  Will definitely make this again.