Add baby arugula to the bowl of a food processor and pulse about 20 seconds, until leaves are broken down. Stop to scrape down sides, as needed.

Add walnuts, peeled garlic cloves and zest and juice of 1 lemon into the bowl. Pulse for another 10 to 15 seconds.

Add in ½ teaspoon kosher salt and ¼ teaspoon cracked black pepper. With the lid secured, turn the food processor on low and slowly drizzle in ½ cup olive oil.

Taste and adjust salt and pepper, as needed. Store in an air-tight container in the refrigerator for up to a week.