Here's What You'll Need
ramps, basil, pecorino romano, walnuts, lemon, salt, black pepper, extra virgin olive oil
If buying a wedge of cheese and grating fresh, either grate by hand or place chunks of Pecorino into a food processor fitted with blade attachment. Pulse until very fine.
Wash to remove any dirt. Trim the root ends off each bulb and discard, then cut just below the leafy greens. Chop the ramp leaves into pieces about 2" long.
Place remaining ingredients (except for olive oil) in the food processor along with the cheese. Pulse until very finely chopped.
With machine on, slowly drizzle in olive oil until smooth and emulsified. If pesto is too chunky, add more olive oil. Serve immediately or store in an in refrigerator until needed.