1 kgfree-range chicken80 ml (1/3 cup) olive oil200 gmdried bucatini1onion, thinly sliced2 cloves garlic, thinly sliced3 slices prosciutto, finely chopped10 gmdried porcini mushrooms, soaked in ½ cup boiling water for 10 minutes100 gmbutter75 gm (½ cup) plain flour500 ml (2 cups) warm milk40 gm (½ cup) finely grated parmesan120 gm (1 cup) frozen baby peas1 tbspfinely chopped rosemary¼ cup (firmly packed) flat-leaf parsley leaves, coarsely chopped60 ml (¼ cup) tomato passata60 ml (¼ cup) pouring creamTo serve:shaved parmesan
Preheat oven to 180C. Place chicken in a roasting pan, drizzle with 2 tbsp oil, season to taste and roast for 1 hr 10 minutes or until golden and just cooked through. Cool and remove meat, discarding bones and skin. Finely chop meat and refrigerate until needed.
Cook bucatini in a large saucepan of boiling salted water until al dente and drain. Toss pasta with a little olive oil and spread over an oven tray to cool.
Heat 2 tbsp oil in a frying pan, add onion and garlic, cook over medium-low heat for 6 minutes or until soft, add prosciutto and cook for another 2 minutes. Drain porcini, reserving liquid, and finely chop porcini. Strain reserved liquid through a fine sieve.
Heat butter in a large saucepan until foamy, add flour and cook over low-medium heat, stirring continuously, for 2 minutes or until golden. Gradually add milk, whisking continuously, until smooth and cook for 2 minutes or until thick and smooth, season to taste. Add chicken, parmesan, peas, onion mixture, herbs, porcini and reserved liquid, stir to combine, then cool.
Brush four 300ml-capacity ovenproof bowls with oil and line with bucatini, starting in the centre in a spiral pattern. Spoon filling among bowls, place in a roasting pan, add enough boiling water to come halfway up sides of bowls, cover pan and bake at 160C for 30 minutes or until warmed through.
Meanwhile, combine passata and cream in a saucepan, bring to the boil, then simmer until reduced by a third and season to taste. Invert timbales onto plates, spoon sauce around and serve with shaved parmesan.