link.Serves 6Oven 180 degreesIngredients■ 2 small onions, chopped■ 2 cloves of garlic, chopped■ 2 leeks, chopped■ 1 tbsp olive oil■ 750g chestnut mushrooms, sliced■1 tbsp chopped tarragon (optional)■ 20g grated cheddar cheese■ 250g dried cannelloni tubesMethod1.
Preheat the oven to 180°C/350°F/gas 4 and grease a 25x30cm dish.2. Peel the onions and garlic and pulse until very fine in a food processor.3.
Heat 1tbsp of oil in a large heat-proof casserole and tip in the onion and garlic – cook over a medium heat.4. Trim, wash, pulse the leeks and add to the casserole.5.
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