Whirl chopped parsley, thyme, lemon zest and juice, oil, salt, and pepper in a blender with 1 tbsp. water until very smooth, 1 to 2 minutes.
Toss parsley leaves, onions, and greens in a large bowl with just enough dressing to coat; reserve any remaining dressing for another use.
Servings 0
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.