Instructions: If using fresh spinach, trim, rinse, shred and cook in a covered saucepan with the minimum of water for 1-3 minutes, until tender.

Cook frozen spinach according to the packet instructions.

Tip the spinach into a colander and drain thoroughly, pressing the green with the back of a spoon to get rid of the excess moisture.

Put the spinach, spring onions, butter, salt and mustard in a food processor or blender and puree until smooth.

Return to a saucepan and heat through, stirring.

Serve hot.

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