Allegra McEvedy has offered some very attractive recipes in the Guardian recently. I think I shall give this one a miss, however. Perhaps it's unfair not to have a go; but there are several details that make me think it would give me trouble.
You fry spiced lamb chops, then onion rings, then slices of butternut squash. You layer them in the frying pan with broccoli, pour stock over it all, and bake for 10 minutes.
First, I would not use a cast iron pan of the type illustrated in the newspaper. Any seasoning that the pan has had - the accretion of a slick layer thanks to cooking fat - will be compromised by the deglazing effect of the stock.
Allegra McEvedy can peel and slice a squash in four minutes, while her onion rings are frying. That is beyond my competence. My biggest reservation, though, concerns the cooking time. Squash is often tough. You cannot rely on it to tenderise after a brief frying and a 10 minute immersion in stock, as it receives here - even assuming that the stock is sufficient to immerse it. The broccoli might be a problem, too. If it does not touch the liquid, it might remain crunchy; if it is immersed, it will overcook.
What do you do with all the liquid at the end? Use some as sauce, and the rest later as stock, I suppose.