Wash the cilantro and shake it dry to remove any excess water. Trim off the very bottom inch of the stems. Place the rest of the bunch—leaves and stems included—directly into the blender.
Pour the olive oil, plain Greek yogurt, and fresh lime juice into the blender jar. Starting with these liquids at the bottom helps the blades process the herbs more smoothly for a creamy finish.
Add the peeled garlic cloves, honey, salt, black pepper, and cumin. If you are using the jalapeno for extra heat, remove the seeds before tossing it in to keep the spice level manageable.
Secure the lid and start the blender on a low setting. Gradually increase the speed to high and blend for 30 to 45 seconds until the dressing is vibrant green and completely smooth.
Pour the dressing into a glass jar and let it rest in the refrigerator for at least 30 minutes. This allows the flavors to deepen before you serve it over your favorite salad or taco bowl.