Everyone is familiar with the idea of a sweet crumble, but savoury crumbles are wonderful too. There is something so comforting and homely about vegetables in creamy, cheesy sauce covered with a crunchy crumble topping. This is a really adaptable recipe which works well with most vegetables, so use whatever you have to hand. You can use it to deal with your Christmas leftovers too; using a mix of roasted roots, if you prefer.
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