
Bright, peppery watercress meets sharp lemon in this vibrant blender sauce that comes together in just a few minutes with a handful of clean, plant-based ingredients. The peppery bite of the watercress is balanced beautifully by the citrus and a touch of garlic, while a slow stream of extra virgin olive oil emulsifies everything into a silky, pourable green sauce. Because it's built entirely from fresh produce, herbs, and olive oil, there's zero concern about hidden animal proteins or cross-contact with red meat — it's naturally safe and genuinely delicious. Drizzle it over roasted vegetables, grilled fish, or grain bowls, and it instantly elevates whatever it touches. The optional flat-leaf parsley adds a subtle herbal note and deepens that gorgeous color if you want to lean into the freshness even more. Blending on high first and then streaming in the oil is the key move here — it gives you that smooth, emulsified texture rather than a gritty, separated mess. Keep a jar of this in the fridge and you'll find yourself reaching for it all week long.
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Combine the watercress, lemon juice, lemon zest, garlic, water, salt, and black pepper in a blender or food processor. Add the parsley, if using.
Blend on high speed for 30 seconds, until the greens are fully broken down and the mixture is a uniform, bright green purée.
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