If you're lucky enough to have access to fresh farm eggs, they'll make for a stellar dish.
Combine first 5 ingredients in a small bowl, stirring with a whisk.
Place watercress in a large bowl. Drizzle half of vinaigrette over watercress; toss gently to coat.
Divide watercress mixture evenly among 4 salad plates; top each serving with 4 egg quarters. Drizzle salads evenly with remaining vinaigrette; sprinkle evenly with salt and pepper.
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