Put the base and blade of your food processor into the freezer for at least 15 minutes.
Bring a small pot of water to boil. Once it's boiling, holding onto the bulbs, allow the green leaves of the ramps to blanch for just 20-30 seconds. Rinse in cold water, and then chop roughly.
Add all the ingredients except the oil to your processor and process on low for 1 minute, until totally combined. Begin to add the oil in a thin stream while the machine is still on, incorporating all the oil slowly. Taste, adjust seasoning, and wrap tightly in the fridge for up to 5 days.