method
1. Heat the butter and oil and cook the mushrooms for 3 minutes, turning from time to time. Flake the tuna fish.
2. Add the tomato puree, white wine to the Bechamel sauce, mix well.
3. Over a low heat re-heat the sauce and gradually stir in the tuna fish and the drained mushrooms.
4. Cook gently for a few minutes until well mixed and hot. Taste and adjust seasoning.
5. Mix the sauce with 450 g (1 lb) cooked pasta.
serving amount
makes 750 ml (1 1/4 pt) sauce
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