The pasta filling and dough can be made a day ahead.
- 700 gm butternut pumpkin, diced
- 2 tbsp olive oil
- 40 gm butter
- ½ onion, finely chopped
- 2 garlic cloves, finely chopped
- 30 gm finely grated parmesan, plus extra to serve
- Finely grated rind of 1 lemon
- ¼ tsp finely grated nutmeg
- 2 tbsp coarsely crushed amaretti biscuits, plus extra to serve
- 1½ tbsp finely chopped mustard fruits (see note)
- 1 quantity egg yolk pasta dough
- 80 gm butter, coarsely chopped
- 12 sage leaves
- 1 onion, very thinly sliced
- 30 ml olive oil
- 1 tbsp aged balsamic vinegar
- 1Preheat oven to 200C. Spread pumpkin on an oven tray, drizzle with oil, season to taste and roast until caramelised and tender (35-40 minutes). Heat butter in a saucepan over medium-high heat, add onion and garlic, stir occasionally until caramelised (6-8 minutes) and season to taste. Process pumpkin, onion mixture, parmesan, lemon rind and nutmeg in a food processor to a smooth purée, season to taste, transfer to a bowl, stir in amaretti and mustard fruits and refrigerate until required.
- 2Meanwhile, cut out 9cm-diameter rounds from pasta dough with a pastry cutter, then, working with 3 or 4 rounds at a time (keep remaining rounds covered with a damp tea towel), place 1 tsp pumpkin mixture in centre of rounds, lightly brush edges with water, fold over to enclose and press edges to seal, ensuring no air is trapped inside. Brush ends lightly with water, bring together, press to seal and set aside on a lightly floured tray.
- 3For onion sauce, melt butter in a frying pan over medium-high heat, add sage, stir occasionally until crisp (1-2 minutes), remove with a slotted spoon and set aside. Add onion and oil to pan, cook until onion is very tender and translucent (6-8 minutes), remove pan from heat, add vinegar and season to taste.
- 4Meanwhile, cook pasta in batches in a large saucepan of generously salted boiling water until al dente (2-3 minutes), drain with a slotted spoon and transfer to serving bowls, Spoon onion sauce over, scatter with sage, extra amaretti and parmesan and serve hot.
Mustard fruits, also called mostarda, are available from select delicatessens.