Instructions: 1. Discard bottom 1 1/2 to 2 inches of thick stems from watercress; coarsely chop remaining leaves and stems. Core lettuce, rinse well, shake dry, and coarsely chop.

2. Heat butter in a heavy-bottomed 3-quart saucepan and add watercress, lettuce, leeks, celery leaves, 1 T of mint, and salt. Cover and cook over medium-low heat until just tender, about 10 minutes.

3. Add stock and water, bring to a boil, and simmer, covered, for 30 minutes.

4. In a small bowl, whisk eggs with lemon juice to blend, then slowly whisk in 1/2 C of soup. Slowly whisk this mixture into soup pot and cook, stirring, over low heat until slightly thickened, about 1 minute. Do not let soup boil. Add pepper and adjust seasonings. Add rice and garnish with remaining mint.

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