Wash the baby spinach, herbs, and green onions. Remove thicker stems from the herbs and spinach. Slice the green onions.
Blend. Add the yogurt, olive oil, spinach, herbs, lemon juice and zest, garlic powder, salt, and pepper to a small blender or food processor. Blend until smooth.
Transfer to an airtight container and store in the refrigerator for 3-4 days.