This recipe is great if you have frozen cauliflower as the florets can roast straight from the freezer. Similarly, I've used minced garlic rather than fresh, substitute 3/4 tsp for each clove to get approximately the same amount. For the stock, you can make this with stock cubes, for each 200ml of stock I use one oxo/knorr cube. So with one onion and some store cupboard items you can make this just as tasty.