Soak the pumpkin seeds in in hot water for 15 minutes, or room-temperature water for at least 4 hours or overnight. Drain well before using.
Combine: Add the soaked pumpkin seeds, tahini, capers, garlic, parsley, tarragon, chives, lemon juice, miso, water, salt, and pepper to a high-speed blender and blend until completely smooth and creamy. Alternatively, add everything to a wide-mouth jar or deep container and blend using an immersion blender until smooth.
Taste and adjust with additional lemon juice, salt, or pepper as needed. For a thinner, more pourable dressing, blend in a little more water until you reach your desired consistency.
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Notes
Nutrition Facts: One serving has about 28% DV iron and 33% DV magnesium.Fresh herbs matter. Tarragon gives this dressing its distinctive flavor, so it's worth using it if possible. Otherwise, substitute the herbs for a total of ½ cups roughly chopped fresh herbs.