
This creamy squash, sage and butter bean hot pot is a hearty vegetarian bake packed with tender root vegetables and rich autumn flavor. A golden spiral of butternut squash makes it as impressive on the table as it is comforting to eat.
Heat 2 tbsp olive oil in a large ovenproof pan over low heat. Add the onions, carrots and celery, then cook gently for 10-15 minutes, stirring occasionally, until softened but not browned. While they cook, peel the butternut squash. Cut off the neck, halve the bulb end, scoop out the seeds and chop the bulb into 3 cm pieces. Thinly slice the squash neck into about 2 mm rounds with a mandoline or sharp knife, keeping the slices together for the topping.
Preheat the oven to 200C/180C fan/gas 6. Stir the garlic, rosemary and bay leaves into the softened vegetables and cook for 1 minute. Add the parsnips and chopped squash, then cook for 5-8 minutes until they begin to soften. Sprinkle over the flour and stir well to coat the vegetables.
Pour in the white wine and let it bubble for a few minutes to reduce slightly. Add the vegetable stock and butter beans, bring to a gentle simmer, then stir in the wholegrain mustard and creme fraiche. Simmer uncovered until the sauce is thick enough to hold the squash topping in place. Remove from the heat, discard the bay leaves, then stir in the chopped sage and season to taste.
Arrange the thin squash slices over the filling in a tight overlapping spiral, starting at the outer edge and working toward the center. Scatter over the reserved sage leaves and drizzle with a little olive oil.
Bake for 35-40 minutes, until the squash topping is tender and lightly golden and the filling is bubbling around the edges. Let the hot pot stand for 5 minutes before serving.
Slice the squash topping as evenly and thinly as possible so it cooks through at the same rate. If you do not want to use wine, replace it with extra vegetable stock. The filling should be thick before baking; if it is too loose, the squash slices may sink. Store leftovers in an airtight container in the refrigerator for up to 3 days and reheat until piping hot.