Instructions: 1. In food processor bowl with metal blade, place tuna, butter, 1/2 cup watercress, lemon juice, salt and white pepper.

2. Pulse on and off until watercress is finely chopped and mixture is blended.

3. Spread tuna on half the bread slices; top with remaining slices.

4. Cut into squares or triangles. Serve or refrigerate up to 2 hours.

5. Garnish with additional watercress.

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